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
|