There are numerous United States Patents regarding Hewlett-Packard calculators, some of which are listed below.
number | title | related model | inventors |
---|---|---|---|
3,381,279 | Read only memory | HP 9100 | Arndt B. Bergh, Charles W. Near |
3,388,385 | Nondestructive round-off display circuit | HP 9100 | Joseph A. Lukes |
3,566,160 | Simplified race-preventing flip-flop having a selectable noise immunity theshold | HP 9100 | Thomas E. Osborne |
3,576,983 | Digital calculator system for computing square roots | David S. Cochran | |
3,588,873 | Information display apparatus | HP 9100 | Thomas E. Osborne, Kay B. Magleby, Joseph A. Lukes |
3,623,156 | Calculator employing multiple registers and feedback paths for flexible subroutine control | HP 9100 | Thomas E. Osborne |
3,641,328 | Keyboard entry means and power control means for calculator | HP 9100 | Thomas E. Osborne |
3,668,697 | Noncontacting keyboard | David S. Cochran, Glenn E. McGhee | |
3,675,213 | Stored data recall means for an electronic calculator | Richard M. Spangler | |
3,678,466 | Electronic Calculator | Richard M. Spangler | |
3,693,162 | Subroutine call and return means for an electronic calculator | Richard M. Spangler | |
3,711,690 | Calculator and tester for user therewith | HP 9100 | Thomas E. Osborne |
3,749,899 | Binary/BCD arithmetic logic unit | Jindrich Kohoutek, Charles W. Near | |
3,755,697 | Light-emitting diode driver | Classic series | Donald K. Miller |
3,757,068 | Keyboard actuating mechanism with particular feel and contact mechanisms | Bernard E. Musch, Donn D. Lobdell | |
3,769,621 | Calculator with provision for automatically interposing memory access cycles between otherwise regularly recurring logic cycles | HP 9100 | Thomas E. Osborne |
3,780,377 | Magnetic card reader-recorder apparatus with provision for avoiding undesired erasures | Richard B. Osgood | |
3,781,820 | Portable Electronic Calculator | David S. Cochran, Thomas E. Osborne | |
3,825,736 | Calculator with provision for efficiently manipulating factors and terms | HP 9100 | Thomas E. Osborne |
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 |
3,855,461 | Calculator with key code association and display features | HP-65 | Richard K. Stockwell |
3,859,635 | Programmable Calculator | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
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 |
3,867,649 | Driver | David S. Cochran | |
3,892,958 | Inverse/complementary function prefix key | HP-65 | Chung C. Tung |
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 |
3,941,953 | Keyboard having switches with tactile feedback | William W. Misson, Clarence K Studley, William J. West, Edward T. Liljenwall | |
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 |
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 |
3,967,370 | Method of manufacturing a multicontact switch | Harry C. Griffin, Thomas E. Holden, Orland E. Upton | |
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 |
3,973,110 | Circulating shift register time-keeping circuit | HP-01 | France Rode, Eric A. Slutz |
3,976,926 | Digital DC motor speed control circuit | HP-91 | William E. Egbert |
3,986,186 | Automatic display segment intensity control | David S. Cochran | |
3,987,290 | Calculator apparatus for displaying data in engineering notation | HP-25 | Peter D. Dickinson |
3,996,562 | Programmable electronic calculator for evaluating mathematical problems | Roy W. Reach, William M. Kahn, David Shapiro | |
3,997,765 | Circulating shift register incrementer/decrementer | HP-01 | Vijay V. Marathe |
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 | |
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 |
4,009,379 | Portable programmable calculator displaying absolute line number addresses and key codes and automatically altering display formats | HP-55 | Bernard E. Musch |
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 |
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 |
4,035,627 | Scientific calculator | HP-45 | Peter D. Dickinson, Thomas E. Osborne, France Rode, Allen J. Baum |
4,037,092 | Calculator having preprogrammed user-definable functions | HP-65 | Thomas E. Osborne, Richard K. Stockwell |
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 |
4,052,604 | Binary adder | David Steven Maitland, Billy E. Thayer | |
4,054,788 | Modular binary half-adder | David Steven Maitland, Sandy Lee Chumbley, Havyn E. Bradley | |
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 |
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 |
4,063,221 | Programmable calculator | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
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 |
4,078,257 | Calculator apparatus with electronically alterable key symbols | Alan S. Bagley | |
Re. 32,040 | Calculator apparatus with electronically alterable key symbols | Alan S. Bagley | |
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 |
4,091,270 | Electronic calculator with optical input means | HP 82153A | Bernard E. Musch, Roy E. Martin |
4,099,246 | Calculator having merged key codes | HP-65 | Thomas E. Osborne, Richard K. Stockwell |
4,106,677 | Wrist wearable electronic device with an engagedly stored selected tool | HP-01 | Bennie E. Helmso, Thomas E. Holden, Edward T. Liljenwall |
4,109,315 | Wristwatch calculator with selectively scanned keyboard | HP-01 | Michael Pan |
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 |
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 |
4,143,809 | Optical bar code reader | HP 82153A | John J. Uebbing, Perry Jeung |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
4,158,285 | Interactive wristwatch calculator | HP-01 | Edward A. Heinsen, Andre F. Marion, Thomas E. Osborne |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
4,197,586 | Electronic calculator assembly | HP-3xC/E | Charles A. Nidiffer |
4,198,684 | Electronic calculator with keyboard-controlled unary function capability | Roy W. Reach, William M. Kahn, David Shapiro | |
4,203,152 | Programmable calculator including key-log printing means | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
4,232,382 | Incrementing signal hold circuit for a clock/calculator | HP-01 | Edward A. Heinsen, Vijay V. Marathe |
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 |
4,291,385 | Calculator having merged key codes | HP-65 | Thomas E. Osborne, Richard Kent Stockwell |
4,309,761 | Calculator for evaluating numerical answers to problems | none? | Roy W. Reach, William M. Kahn, David Shapiro |
4,314,112 | Keyboard having switches with tactile feedback | William W. Misson, Clarence K Studley, Bernard M. Oliver, Edward T. Liljenwall | |
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 |
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 |
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 |
4,381,554 | Calculator for storing source data and evaluating numerical answers to problems | none? | Roy W. Reach, William M. Kahn, David Shapiro |
4,384,328 | Programmable calculator including magnetic reading and recording means | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
4,412,300 | Programmable calculator including alphabetic output capability | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
4,424,563 | Data processor including a multiple word processing method and device | HP-85 | Todd R. Lynch |
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 |
4,455,607 | Programmable calculator having keys for performing angular measurement unit conversion | HP 9810 | Robert E. Watson, Jack M. Walden, Charles W. Near |
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 |
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 |
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 |
4,845,652 | Generic equation solver interface for solving mathematical equations | HP-28C | Christopher M. Bunsen |
4,852,057 | Algebraic expression method and implementation for an electronic data processing apparatus | HP-28C | Charles M. Patton |
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 |
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 |
5,020,012 | Method and apparatus for matching menu labels with keys | HP-32S | Randall L. Stockberger, Christopher M. Bunsen |
5,025,403 | Fraction entry and display | HP-32S | Bruce A. Stephens |
5,065,356 | Shared use of keyboard and memory lines | Robert B. E. Puckette | |
5,067,102 | Method and apparatus for displaying and editing mathematical expressions in textbook format | HP-48SX | Gabe L. Eisenstein |
5,075,792 | Low power optical transceiver for portable computing devices | HP-48SX | Preston D. Brown, Lester S. Moore, Dennis C. York |
5,089,980 | Double keystroke fraction entry and interface method | HP-32S | Chris M. Bunsen, Bruce A. Stephens |
5,128,887 | Numerical accuracy indicator for rounded numeric value display method | HP-32S | Mark A. Smith, Chris M. Bunsen |
5,155,697 | Most precise fraction display method | Chris M. Bunsen | |
5,175,700 | Method and apparatus for solving multiple equations | HP 82211A | Eric L. Vogel, Chris M. Bunsen |
5,216,627 | Method and apparatus for computing with terms having units | Paul J. McClellan, Eric L. Vogel, William C. Wickes | |
5,258,748 | Accessing and selecting multiple key functions with minimum keystrokes | Robert W. Jones | |
5,260,886 | Default denominator for fraction entry and display | Chris M. Bunsen |
number | title | related model | inventor(s) |
---|---|---|---|
D244,862 | Casing for an electronic calculator | HP 9815 | Barry R. Mathis |
D245,107 | Electronic calculator | HP 9815 | Barry R. Mathis |
D245,810 | Casing for an electronic calculator | HP 9825 | Leroy J. LaCelle |
D249,090 | Casing for an electronic calculator | HP 9825 | Leroy J. LaCelle |
D249,243 | Wristwatch calculator | HP-01 | Edward E. Salter |
D249,244 | Electronic wristwatch or the like | HP-01 | Edward E. Salter |
D256,133 | Casing for an electronic calculator | HP 9845 | LeRoy J. LaCelle |
D321,865 | Electronic notepad for data entry | Michael D. Derocher | |
D333,129 | Palmtop computer | HP-95LX | Michael D. Derocher |
Last updated 2022-10-24 Copyright 1995, 1998, 2002, 2003, 2004, 2005, 2006, 2007, 2016, 2022 Eric Smith |
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