Last updated May 28, 2006
Copyright 1995, 1998, 2002, 2003, 2004, 2005, 2006, 2007 Eric Smith
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There are numerous United States Patents regarding Hewlett-Packard calculators, some of which are listed below.
| number | title | related model | inventors | PDF file |
|---|---|---|---|---|
| 3,381,279 | Read only memory | HP 9100 | Arndt B. Bergh, Charles W. Near | 3381279.pdf (336K) |
| 3,388,385 | Nondestructive round-off display circuit | HP 9100 | Joseph A. Lukes | 3388385.pdf (481K) |
| 3,566,160 | Simplified race-preventing flip-flop having a selectable noise immunity theshold | HP 9100 | Thomas E. Osborne | 3566160.pdf (3.2M) |
| 3,588,873 | Information display apparatus | HP 9100 | Thomas E. Osborne, Kay B. Magleby, Joseph A. Lukes | 3588873.pdf (326K) |
| 3,623,156 | Calculator employing multiple registers and feedback paths for flexible subroutine control | HP 9100 | Thomas E. Osborne | 3623156.pdf (2.9M) |
| 3,641,328 | Keyboard entry means and power control means for calculator | HP 9100 | Thomas E. Osborne | 3641328.pdf (2.8M) |
| 3,668,697 | Noncontacting keyboard | David S. Cochran, Glenn E. McGhee | 3668697.pdf (313K) | |
| 3,675,213 | Stored data recall means for an electronic calculator | Richard M. Spangler | 3675213.pdf (197K) | |
| 3,678,466 | Electronic Calculator | Richard M. Spangler | 3678466.pdf (191K) | |
| 3,693,162 | Subroutine call and return means for an electronic calculator | Richard M. Spangler | 3693162.pdf (213K) | |
| 3,711,690 | Calculator and tester for user therewith | HP 9100 | Thomas E. Osborne | 3711690.pdf (3.2M) |
| 3,749,899 | Binary/BCD arithmetic logic unit | Jindrich Kohoutek, Charles W. Near | 3749899.pdf (325K) | |
| 3,755,697 | Light-emitting diode driver | Classic series | Donald K. Miller | 3755697.pdf (328K) |
| 3,757,068 | Keyboard actuating mechanism with particular feel and contact mechanisms | Bernard E. Musch, Donn D. Lobdell | 3757068.pdf (401K) | |
| 3,769,621 | Calculator with provision for automatically interposing memory access cycles between otherwise regularly recurring logic cycles | HP 9100 | Thomas E. Osborne | 3769621.pdf (2.9M) |
| 3,781,820 | Portable Electronic Calculator | HP-35 | David S. Cochran, Thomas E. Osborne | 3781820.pdf (462K) |
| 3,825,736 | Calculator with provision for efficiently manipulating factors and terms | HP 9100 | Thomas E. Osborne | 3825736.pdf (4.1M) |
| 3,839,630 | Programmable calculator employing algebraic language | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 3839630.pdf ( 16M) |
| 3,855,461 | Calculator with key code association and display features | HP-65 | Richard K. Stockwell | 3855461.pdf (392K) |
| 3,859,635 | Programmable Calculator | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 3859635.pdf ( 17M) |
| 3,863,060 | General purpose calculator with capability for performing interdisciplinary business calculations | HP-80 | France Rode, William L. Crowley Jr., Alexander D.R. Walker, David S. Cochran | 3863060.pdf (3.6M) |
| 3,867,649 | Differential pair | David S. Cochran | ||
| 3,892,958 | Inverse/complementary function prefix key | HP-65 | Chung C. Tung | 3892958.pdf (229K) |
| 3,893,173 | Miniaturized magnetic card reader/recorder for use in hand-held calculator | HP-65 | Robert B. Taggart, Richard H. Barth, John S. Bailey | 3893173.pdf (359K) |
| 3,941,953 | Keyboard having switches with tactile feedback | William W. Misson, Clarence K Studley, William J. West, Edward T. Liljenwall | 3941953.pdf (446K) | |
| 3,946,218 | General purpose calculator with capability for performain yield-to-maturity of a bond calculation | HP-80 | France Rode, William L. Crowley Jr., Alexander D.R. Walker, David S. Cochran | 3946218.pdf (253K) |
| 3,955,074 | General purpose calculator having keys with more than one function assigned thereto | HP-80 | France Rode, William L. Crowley Jr., Alexander D.R. Walker | 3955074.pdf (211K) |
| 3,967,370 | Method of manufacturing a multicontact switch | Harry C. Griffin, Thomas E. Holden, Orland E. Upton | 3967370.pdf (679K) | |
| 3,971,925 | Adaptable programmed calculator having provision for plug-in keyboard and memory modules | HP 9805 | Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, David S. Maitland, Douglas M. Clifford, Louis T. Schulte | 3971925.pdf (8.0M) |
| 3,973,110 | Circulating shift register time-keeping circuit | HP-01 | France Rode, Eric A. Slutz | 3973110.pdf (2.3M) |
| 3,976,926 | Digital DC motor speed control circuit | HP-91 | William E. Egbert | 3976926.pdf (267K) |
| 3,986,186 | Automatic display segment intensity control | David S. Cochran | 3986186.pdf (191K) | |
| 3,987,290 | Calculator apparatus for displaying data in engineering notation | HP-25 | Peter D. Dickinson | 3987290.pdf (521K) |
| 3,996,562 | Programmable electronic calculator for evaluating mathematical problems | none? | Roy W. Reach, William M. Kahn, David Shapiro | 3996562.pdf (2.1M) |
| 3,997,765 | Circulating shift register incrementer/decrementer | HP-01 | Vijay V. Marathe | 3997765.pdf (305K) |
| 4,000,389 | Printed circuit board and contact assembly for keyboard switch assemblies | William W. Misson, Clarence K. Studley, William J. West, Edward T. Liljenwall | 4000389.pdf (401K) | |
| 4,001,569 | General purpose calculator having selective data storage, data conversion, and time-keeping capabilities | HP-45 | Peter D. Dickinson, Thomas E. Osborne, France Rode, Allen J. Baum | 4001569.pdf (4.2M) |
| 4,009,379 | Portable programmable calculator displaying absolute line number addresses and key codes and automatically altering display formats | HP-55 | Bernard E. Musch | 4009379.pdf (2.6M) |
| 4,012,725 | Programmable Calculator | HP 9830 | Richard M. Spangler, Eugene V. Burmeister, Frank E. Cada, Wayne F. Covington, Chris J. Christopher, Myles A. Judd, Freddie W. Wenninger, Robert E. Watson, Kent W. Simcoe | 4012725.pdf ( 22M) |
| 4,028,538 | Programmable calculator employing algebraic language | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4028538.pdf (1.1M) |
| 4,035,627 | Scientific calculator | HP-45 | Peter D. Dickinson, Thomas E. Osborne, France Rode, Allen J. Baum | 4035627.pdf (547K) |
| 4,037,092 | Calculator having preprogrammed user-definable functions | HP-65 | Thomas E. Osborne, Richard K. Stockwell | 4037092.pdf (389K) |
| 4,047,012 | General purpose calculator having factorial capability | HP-45 | Peter D. Dickinson, Thomas E. Osborne, France Rode, Allen J. Baum, David S. Cochran, Chung C. Tung | 4047012.pdf (233K) |
| 4,052,604 | Binary adder | David Steven Maitland, Billy E. Thayer | 4052604.pdf (511K) | |
| 4,054,788 | Modular binary half-adder | David Steven Maitland, Sandy Lee Chumbley, Havyn E. Bradley | 4054788.pdf (407K) | |
| 4,055,757 | Calculator apparatus with annuity switch for performing begin- and end-period annuity calculations | HP-22 | Lynn W. Tillman, Kent R. Henscheid, Larry D. Smith | 4055757.pdf (497K) |
| 4,059,750 | General purpose calculator having selective data storage, data conversion and time-keeping capabilities | HP-45 | Peter D. Dickinson, Thomas E. Osborne, France Rode, Allen J. Baum | 4059750.pdf (276K) |
| 4,063,221 | Programmable calculator | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 4063221.pdf (1.9M) |
| 4,075,679 | Programmable calculator | HP 9825 | Chris J. Christopher, Fred W. Wenninger, Donald E. Morris, Wayne F. Covington, Jerry B. Folsom, Joseph W. Beyers, John H. Nairn, Jeffrey C. Osborne | 4075679.pdf ( 26M) |
| 4,078,257 | Calculator apparatus with electronically alterable key symbols | Alan S. Bagley | 4078257.pdf (654K) | |
| Re. 32,040 | Calculator apparatus with electronically alterable key symbols | Alan S. Bagley | RE32040.pdf (666K) | |
| 4,089,059 | Programmable calculator employing a read-write memory having a movable boundary between program and data storage sections thereof | HP 9815 | Bradley W. Miller, Franklin T. Hickenlooper, David C. Uhlrich, Marl D. Godfrey, Douglas M. Clifford, Rex L. James, Robert E. Watson, John C. Keith, Allan C. Mortensen | 4089059.pdf ( 13M) |
| 4,091,270 | Electronic calculator with optical input means | HP 82153A | Bernard E. Musch, Roy E. Martin | 4091270.pdf (722K) |
| 4,099,246 | Calculator having merged key codes | HP-65 | Thomas E. Osborne, Richard K. Stockwell | 4099246.pdf (1.5M) |
| 4,106,677 | Wrist wearable electronic device with an engagedly stored selected tool | HP-01 | Bennie E. Helmso, Thomas E. Holden, Edward T. Liljenwall | 4106677.pdf (269K) |
| 4,109,315 | Wristwatch calculator with selectively scanned keyboard | HP-01 | Michael Pan | 4109315.pdf (461K) |
| 4,126,898 | Programmable calculator including terminal control means | HP 9830 | Richard M. Spangler, Eugene V. Burmeister, Frank E. Cada, Wayne F. Covington, Chris J. Christopher, Myles A. Judd, Freddie W. Wenninger, Robert E. Watson, Kent W. Simcoe | 4126898.pdf (1.1M) |
| 4,127,897 | Programmable calculator having extended input/output capability | HP 9830 | Richard M. Spangler, Eugene V. Burmeister, Frank E. Cada, Wayne F. Covington, Chris J. Christopher, Myles A. Judd, Freddie W. Wenninger, Robert E. Watson, Kent W. Simcoe | 4127897.pdf (1.0M) |
| 4,143,809 | Optical bar code reader | HP 82153A | John J. Uebbing, Perry Jeung | 4143809.pdf (167K) |
| 4,145,742 | Programmable calculator including user-definable keys | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4145742.pdf (2.1M) |
| 4,145,752 | Programmable calculator including separate line numbering means for user-definable functions | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4145752.pdf (2.0M) |
| 4,152,769 | Programmable calculator including means for permitting data entry during program execution | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4152769.pdf (1.6M) |
| 4,152,770 | Programmable calculator including means for programmably controlling magnetic storage units | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4152770.pdf (1.8M) |
| 4,152,771 | Programmable calculator including display means for signalling the user to indicate the exhaustion of a printer paper supply | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4152771.pdf (1.6M) |
| 4,152,773 | Programmable calculator including means for establishing a priority for executing algebraic operations | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4152773.pdf (1.6M) |
| 4,152,774 | Programmable calculator including keyboard function means for raising the number ten to any designated power | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4152774.pdf (1.7M) |
| 4,156,282 | Programmable calculator including relational operator means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4156282.pdf (1.6M) |
| 4,156,285 | Programmable calculator including keyboard functions whose argument may be a numeric constant, a storage register, or an arithmetic expression | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4156285.pdf (1.7M) |
| 4,156,917 | Programmable calculator including separate user program and data memory areas | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4156917.pdf (1.6M) |
| 4,156,918 | Programmable calculator including means for performing computed jumps during program execution | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4156918.pdf (1.6M) |
| 4,156,921 | Adaptable programmed calculator including automatic decimal point positioning | HP 9805 | Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, David S. Maitland, Douglas M. Clifford, Louis T. Schulte, John C. Keith | 4156921.pdf (496K) |
| 4,158,228 | Programmable calculator including alphanumeric error display means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4158228.pdf (1.7M) |
| 4,158,231 | Programmable calculator including program listing means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4158231.pdf (1.6M) |
| 4,158,233 | Programmable calculator including means for performing implied multiply operations | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4158233.pdf (1.6M) |
| 4,158,285 | Interactive wristwatch calculator | HP-01 | Edward A. Heinsen, Andre F. Marion, Thomas E. Osborne | 4158285.pdf (7.0M) |
| 4,159,525 | Programmable calculator employing computed memory addresses | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4159525.pdf (1.7M) |
| 4,161,031 | Programmable calculator including boolean flag variable means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4161031.pdf (1.6M) |
| 4,162,532 | Programmable calculator including data format display control means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4162532.pdf (1.6M) |
| 4,164,019 | Programmable calculator including alphanumeric display means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4164019.pdf (1.6M) |
| 4,164,039 | Programmable calculator including a key for performing either a subtraction or a unary minus function | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4164039.pdf (1.6M) |
| 4,177,518 | Programmable calculator including scrolling alphanumeric display means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4177518.pdf (1.8M) |
| 4,177,520 | Calculator apparatus having a single-step key for displaying and executing program steps and displaying the result | HP-25 | Randall B. Neff | 4177520.pdf (546K) |
| 4,178,633 | Programmable calculator including multifunction keys | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4178633.pdf (1.5M) |
| 4,180,854 | Programmable calculator having string variable editing capability | HP 9845A | Jack M Walden, William D. Eads, Ray J. Cozzens, John L. Bidwell, Robert A. Jewett, Martin S. Wilson, Daniel J. Griffin, Robert E. Kuseski, Louis T. Schulte | 4180854.pdf ( 21M) |
| 4,181,965 | Programmable calculator including program trace means | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4181965.pdf (1.6M) |
| 4,181,966 | Adaptable programmed calculator including a percent keyboard operator | HP 9805 | Freddie W. Wenninger, Donald E. Morris, Jindrich Kohoutek, Davis S. Maitland, Douglas M. Clifford, Louis T. Shulte, John C. Keith | 4181966.pdf (529K) |
| 4,187,547 | Programmable calculator including means for controllably introducing blank lines on a printed record during program execution | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4187547.pdf (1.5M) |
| 4,197,586 | Electronic calculator assembly | HP-3xC/E | Charles A. Nidiffer | 4197586.pdf (424K) |
| 4,198,684 | Electronic calculator with keyboard-controlled unary function capability | none? | Roy W. Reach, William M. Kahn, David Shapiro | 4198684.pdf (1.8M) |
| 4,203,152 | Programmable calculator including key-log printing means | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 4203152.pdf (3.0M) |
| 4,232,382 | Incrementing signal hold circuit for a clock/calculator | HP-01 | Edward A. Heinsen, Vijay V. Marathe | 4232382.pdf (414K) |
| 4,281,390 | Programmable calculator including means for performing computed and uncomputed relative branching during program execution | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | 4281390.pdf (1.5M) |
| 4,291,385 | Calculator having merged key codes | HP-65 | Thomas E. Osborne, Richard Kent Stockwell | 4291385.pdf (1.4M) |
| 4,309,761 | Calculator for evaluating numerical answers to problems | none? | Roy W. Reach, William M. Kahn, David Shapiro | 4309761.pdf (1.9M) |
| 4,314,112 | Keyboard having switches with tactile feedback | William W. Misson, Clarence K Studley, Bernard M. Oliver, Edward T. Liljenwall | 4314112.pdf (438K) | |
| 4,322,816 | Programmable calculator having structure for controlling an x-y plotter | HP 9830 | Richard M. Spangler, Eugene V. Burmeister, Frank E. Cada, Wayne F. Covington, Chris J. Christopher, Myles A. Judd, Freddie W. Wenninger, Robert E. Watson, Kent W. Simcoe | 4322816.pdf (951K) |
| 4,330,839 | Programmable calculator including means for automatically processing imformation stored on a magnetic record member | HP 9815 | Bradley W. Miller, Franklin T. Hickenlooper, David C. Uhlrich, Marl D. Godfrey, Douglas M. Clifford, Rex L. James, Robert E. Watson, John C. Keith, Allan C. Mortensen | 4330839.pdf (657K) |
| 4,366,553 | Electronic computing apparatus employing basic language | HP 9830 | Richard M. Spangler, Eugene V. Burmeister, Frank E. Cada, Wayne F. Covington, Chris J. Christopher, Myles A. Judd, Freddie W. Wenninger, Robert E. Watson, Kent W. Simcoe | 4366553.pdf (915K) |
| 4,381,554 | Calculator for storing source data and evaluating numerical answers to problems | none? | Roy W. Reach, William M. Kahn, David Shapiro | 4381554.pdf (1.9M) |
| 4,384,328 | Programmable calculator including magnetic reading and recording means | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 4384328.pdf (2.5M) |
| 4,412,300 | Programmable calculator including alphabetic output capability | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 4412300.pdf (2.9M) |
| 4,424,563 | Data processor including a multiple word processing method and device | HP-85 | Todd R. Lynch | 4424563.pdf (1.1M) |
| 4,437,156 | Programmable calculator | HP 9825 | Chris J. Christopher, Fred W. Wenninger, Donald E. Morris, Wayne F. Covington, Jerry B. Folsom, Joseph W. Beyers, John H. Nairn, Jeffrey C. Osborne | 4437156.pdf ( 12M) |
| 4,455,607 | Programmable calculator having keys for performing angular measurement unit conversion | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near | 4455607.pdf (2.5M) |
| 4,455,618 | Programmable calculator | HP 9845A | Jack M Walden, William D. Eads, Ray J. Cozzens, John L. Bidwell, Robert A. Jewett, Martin S. Wilson, Daniel J. Griffin, Robert E. Kuseski, Louis T. Schulte | 4455618.pdf (801K) |
| 4,456,964 | Calculator including means for displaying alphanumeric prompting messages to the operator | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | |
| 4,460,974 | Electronic computer with access to keyboard status information | |||
| 4,480,305 | Programmable calculator including editing capability | |||
| 4,546,448 | Programmable calculator including program variable initialization means and definition means array | |||
| 4,566,072 | Programamble calculator including means for digitizing the position of an X-Y plotter pen | HP 9815 | Allan C. Mortensen, Bradley W. Miller, Franklin T. Hickenlooper, David C. Uhlrich, Marl D. Godfrey, Douglas M. Clifford, Rex L. James, Robert E. Watson, John C. Keith | 4566072.pdf (859K) |
| 4,611,307 | Function analyzing | |||
| 4,615,015 | Self-contained electronic computer including means for immediately executing or storing alphanumeric statements entered into the computer | HP 9820 | Emil E. Olander, Jr., Rex L. James, Ivar W. Larson, Wayne F. Covington, Jack M. Walden, Robert E. Watson, Francis J. Yockey, Fred Wenninger, Jr., Homer C. Russell | |
| 4,821,228 | Method and apparatus for computation stack recovery in a calculator | HP-28C | William C. Wickes, Laurence W. Grodd | 4821228.pdf (1.0M) |
| 4,845,652 | Generic equation solver interface for solving mathematical equations | HP-28C | Christopher M. Bunsen | 4845652.pdf (1.1M) |
| 4,852,057 | Algebraic expression method and implementation for an electronic data processing apparatus | HP-28C | Charles M. Patton | 4852057.pdf (1.3M) |
| 4,868,745 | Data processing system and method for the direct and indirect execution of uniformly structured object types | HP-28C | Charles M. Patton, Laurence Grodd, William C. Wickes | 4868745.pdf (1.1M) |
| 4,885,714 | Calculator having a user-accessible object stack for the uniform application of mathematical functions and logical operations to a multiplicity of object types | HP-28C | Gabe L. Eisenstein, Laurence W. Grodd, Paul J. McClellan, Robert M. Miller, Charles M. Patton, William C. Wickes | 4885714.pdf (934K) |
| 5,020,012 | Method and apparatus for matching menu labels with keys | HP-32S | Randall L. Stockberger, Christopher M. Bunsen | 5020012.pdf (392K) |
| 5,025,403 | Fraction entry and display | HP-32S | Bruce A. Stephens | 5025403.pdf (873K) |
| 5,065,356 | Shared use of keyboard and memory lines | Robert B. E. Puckette | 5065356.pdf (407K) | |
| 5,067,102 | Method and apparatus for displaying and editing mathematical expressions in textbook format | HP-48SX | Gabe L. Eisenstein | 5067102.pdf (523K) |
| 5,075,792 | Low power optical transceiver for portable computing devices | HP-48SX | Preston D. Brown, Lester S. Moore, Dennis C. York | 5075792.pdf (566K) |
| 5,089,980 | Double keystroke fraction entry and interface method | HP-32S | Chris M. Bunsen, Bruce A. Stephens | 5089980.pdf (353K) |
| 5,128,887 | Numerical accuracy indicator for rounded numeric value display method | HP-32S | Mark A. Smith, Chris M. Bunsen | 5128887.pdf (316K) |
| 5,155,697 | Most precise fraction display method | Chris M. Bunsen | 5155697.pdf (388K) | |
| 5,175,700 | Method and apparatus for solving multiple equations | HP 82211A | Eric L. Vogel, Chris M. Bunsen | 5175700.pdf (585K) |
| 5,216,627 | Method and apparatus for computing with terms having units | Paul J. McClellan, Eric L. Vogel, William C. Wickes | 5216627.pdf (1.0M) | |
| 5,258,748 | Accessing and selecting multiple key functions with minimum keystrokes | Robert W. Jones | 5258748.pdf (385K) | |
| 5,260,886 | Default denominator for fraction entry and display | Chris M. Bunsen | 5260886.pdf (266K) |
| number | title | related model | inventor(s) | PDF file |
|---|---|---|---|---|
| D244,862 | Casing for an electronic calculator | HP 9815 | Barry R. Mathis | D244862.pdf ( 79K) |
| D245,107 | Electronic calculator | HP 9815 | Barry R. Mathis | D245107.pdf (124K) |
| D245,810 | Casing for an electronic calculator | HP 9825 | Leroy J. LaCelle | D245810.pdf ( 76K) |
| D249,090 | Casing for an electronic calculator | HP 9825 | Leroy J. LaCelle | D249090.pdf ( 62K) |
| D249,243 | Wristwatch calculator | HP-01 | Edward E. Salter | D249243.pdf ( 71K) |
| D249,244 | Electronic wristwatch or the like | HP-01 | Edward E. Salter | D249244.pdf ( 83K) |
| D256,133 | Casing for an electronic calculator | HP 9845 | LeRoy J. LaCelle | D256133.pdf (101K) |
| D321,865 | Electronic notepad for data entry | Michael D. Derocher | D321865.pdf ( 97K) | |
| D333,129 | Palmtop computer | HP-95LX | Michael D. Derocher | D333129.pdf (164K) |
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Last updated May 28, 2006 Copyright 1995, 1998, 2002, 2003, 2004, 2005, 2006, 2007 Eric Smith |
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