HP Calculator Patents

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
3,781,820 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

Design Patents

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

Other Related Patents


Last updated 2016-01-06

Copyright 1995, 1998, 2002, 2003, 2004, 2005, 2006, 2007, 2016 Eric Smith

hacker emblem
Best Viewed With Any Browser Valid HTML 4.01! Valid CSS!

check now

check now