This compilation Copyright (C) 2005 Mike Sebastian. No copyright claim is made to original U.S. Government works.

Calculator Patents - Specialized Calcuators


U.S. Patent No. Assignee File Date Issue Date Inventor1 Product Title Comments
3654449 Diversified Electronics Co., Inc. November 5, 1970 April 4, 1972 Boyce - Calculator input means to bypass conventional keyboard input Calculator used as counter/data acquisition device
3777126 Dietzgen Electronics, Inc. April 14, 1969 December 4, 1973 Hoff - Measurement transducer calculator interface Calculator used as counter/data acquisition device
3813533 Garrett Comptronics Corp June 2, 1972 May 28, 1974 Cone - Clock calculator -
3816731 Rodney L. Jennings February 20, 1973 June 11, 1974 Jennings - Conversion apparatus utilized with an electronic calculator Length/angle converter which monitors keystrokes and generates keystroke signals (like the MM5765 programmer chip) to enter converted data into the calculator
3867619 Tobishi Pharmaceutical Co., Ltd. June 24, 1972 February 18, 1975 Arauchi - Desk top electronic computer with digital clock -
3924111 (none) September 25, 1974 December 2, 1975 Farris - Electronic calculator for navigational purposes -
3932709 General Teletronics Inc. April 16, 1973 13, 1976 Hoff - Electronic business telephone Telephone/calculator
3955073 (none) May 14, 1974 May 4, 1976 Carew - Caliper type dimensional sensing devices and associated electronic measuration, data processing and printout system Measuring calipers feed measurements to a calculator
3968583 (none) March 24, 1975 July 13, 1976 Allam - Numeric display for arabic speaking people Twelve-segment display for displaying numbers as written in the arabic language
3973113 (none) September 19, 1974 August 3, 1976 Goldsamt - Electronic calculator for feet-inch-fraction numerics -
3979057 Specialized Electronics Corp. October 29, 1974 September 7, 1976 Katz - Electronic navigational computer -
3979058 Specialized Electronics Corp. October 29, 1974 September 7, 1976 Katz - Operator prompting system for stored program calculator Preprogrammed calculator prompts user for inputs
3995123 (none) January 9, 1974 November 30, 1976 Wilson - Telephone calculator -
4024347 Lake Center Industries August 11, 1975 May 17, 1977 Carter - Telephone calculator Uses National Semiconductor MM5738 calculator chip
4031376 (none) June 30, 1975 June 21, 1977 Corkin - Calculating method and apparatus for handicapping thoroughbred races and the like -
4041291 (none) December 19, 1975 August 9, 1977 Pavda - Dollars and cents telephone metering computer Calculator chip used to compute cost of long distance telephone call
4048484 (none) April 26, 1976 September 13, 1977 Brittan - Digital grade averager Teacher grading calculator
4060719 (none) July 23, 1976 November 29, 1977 Dalinowski - Computer for solving unknown parameters of geometric figures Preprogrammed calculator for problems involving triangles
4063046 Jerome D. Schiffman & Milton Shlaes September 24, 1974 December 13, 1977 Schiffman - Telephone mounted calculator Calculator sits on top of keypad for regular desktop telephone, uses MM5737
4071891 (none) April 30, 1976 January 31, 1978 Barrows - Electronic calculator - register for hematology differentials Calculator for doing cell counts
4081859 (none) September 19, 1974 March 28, 1978 Goldsamt - Electronic calculator for feet-inch-fraction numerics -
4088837 (none) April 5, 1976 May 9, 1978 Singer - Combination telephone and calculator with common keyboard having reversible indicia -
4092523 (none) August 16, 1976 May 30, 1978 Tava - Conversion calculator Currency converter
4095274 (none) April 27, 1977 June 13, 1978 Gordon - Apparatus for determining food content Kitchen calculator/timer incorporating flip cards containing nutritional information
4100602 MIT November 10, 1976 July 11, 1978 Shapiro - Recipe conversion calculator Metric/kitchen conversion calculator
4100603 Joseph Lyndon Boyd December 16, 1976 July 11, 1978 Boyd - Feet, inches and sixteenths adder Add and subtract feet, inches, and 16ths of an inch; no multiplication or division
4117542 (none) July 7, 1977 September 26, 1978 Klausner - Electronic pocket directory -
4118783 (none) February 7, 1977 October 3, 1978 Collins - Digital grade averager Teacher grading calculator
4119810 Phone Devices Corp. September 13, 1976 October 10, 1978 Marin - Pushbutton telephone apparatus with automatic dialing and combinational sequential control signalling capabilities Telephone/calculator; uses MM5737
4120037 Olympus Optical Company Ltd. March 23, 1976 October 10, 1978 Sato - Desk-top electronic calculator and tape recorder assembly -
4122526 Pitney-Bowes, Inc. December 20, 1976 October 24, 1978 Dlugos - Calculating and postal zip code-to-postal zone converting apparatus Calculator and postal zone calculation
4151596 Science Accessories Corp. September 26, 1977 April 24, 1979 Howells - Calculator interface Digitizing tablet for calculator
4156912 Systek Corp. July 31, 1974 May 29, 1979 Shigeta - Electronic navigation calculator -
4164038 (none) July 5, 1977 August 7, 1979 Nachtigal - Combination calculator and time billing device -
4192006 (none) August 7, 1978 March 4, 1980 Hausdorff - Portable travel expense tabulator -
4212079 GPD Inc. May 18, 1978 July 8, 1980 Segar - Electronic calorie calculator Calculates calories consumed and calories burned
4222109 (none) June 5, 1978 September 9, 1980 Siwula - Electronic checkbook Checkbook calculator
4224675 (none) December 11, 1978 September 23, 1980 Pinkerman - Portable checkbook-balance calculating device -
4228516 (none) December 26, 1978 October 14, 1980 Johnston - Computer for metric conversion Metric conversion calculator
4232367 (none) June 12, 1978 November 4, 1980 Youden - Apparatus for maximizing interest earnings and providing payments from principal without interest penalty Financial calculator for optimizing earnings between different types of interest bearing accounts; looks like applicant borrowed HP-80 patent images
4244020 (none) January 15, 1979 January 6, 1981 Ratcliff - Caloric and/or carbohydrate calculator -
4245323 Copol Co., Ltd. June 30, 1977 January 13, 1981 Yamazaki - Electronic calculator with time display function -
4246703 (none) June 28, 1979 January 27, 1981 Robinet - Electronic drafting instrument with digital readout of displacement -
4270173 (none) October 5, 1979 May 26, 1981 Suttler - Electronic scaler Graphics arts scaling calculator; dimensions can be entered via adjustable copy-layout frame
4275443 (none) May 7, 1979 June 23, 1981 Sorin - Board game computing device Backgammon calculator
4279022 Tokyo Shibaura Electric Co., Ltd. May 14, 1977 July 14, 1981 Abe - Electronic calculator/memorandum apparatus -
4282514 (none) December 17, 1976 August 4, 1981 Elkin - Electronic converter Dual display metric converter
4282571 (none) January 22, 1979 August 4, 1981 Giovannoli - Electronic distance measurement and displaying apparatus Drafting instrument
4282580 (none) September 10, 1979 August 4, 1981 McGuire - Pocket calculator with grade averaging function Teacher grading calculator
4290113 Labora Mannheim GmbH fur Labortechnik December 13, 1977 September 15, 1981 Haker - Minicomputer Unit conversion calculator
4308588 (none) June 5, 1978 December 29, 1981 Siwula - Electronic checkbook Checkbook calculator
4319130 VEB Applikationszentrum Elektronik Berlin May 18, 1976 March 9, 1982 Spitzner - Device for the automated digital transcription and processing of quantities and units Unit conversion calculator
4334278 (none) May 6, 1980 June 8, 1982 Marmon - Shoppers coupon calculator Calculator optimized for use by a shopper; helps shopper determine best value based on price, size/quantity, and coupon value
4362393 (none) November 17, 1980 December 7, 1982 Tissot - Chess clock Calculator receives 1 second pulses to count time
4367526 (none) September 8, 1980 January 4, 1983 McGeary - Golf calculator -
4377850 (none) June 23, 1977 March 22, 1983 Simpson - Hand-held measuring and calculating device Measuring wheel with calculator
4380802 GPD Inc. May 18, 1978 April 19, 1983 Segar - Electronic calorie calculator Calculates calories consumed and calories burned
4383301 (none) May 5, 1977 May 10, 1983 Morita - Measurement and calculating instrument Calculator with wheel for measuring distances on map or drawing
4398086 Smith Engineering January 6, 1982 August 9, 1983 Smith General Consumer Elecronics, Inc. Chase-n-Counter, Space-n-Counter Game-calculator having sliding mask -
4405991 (none) April 7, 1981 September 20, 1983 Stanley - Kitchen calculator -
4446528 (none) June 8, 1980 May 1, 1984 Marmon - Shoppers calculator Calculator optimized for use by a shopper; helps shopper determine best value based on price, size/quantity, and coupon value
4458320 (none) July 6, 1981 July 3, 1984 Sutton - Electronic calculating device Calculator optimized for use by a shopper; price data automatically added to total after a period of inactivty, negating the need for pressing an addition/entry key
4463438 Industrial Mainenance Systems, Inc. December 11, 1981 July 31, 1984 Zatezalo - Shaft alignment calculator Specialized calculator to facilitate shaft alignment
4488250 (none) July 2, 1982 December 11, 1984 Lipsey Sonin InchMate+ Hand-held calculator for performing calculations in feet, inches and fractions -
4545022 (none) February 10, 1983 October 1, 1985 Hughins - Fractional calculator -
4689753 (none) June 12, 1985 August 25, 1987 Cameron - Calculator for chemical stoichiometry -
4709331 (none) May 1, 1984 November 24, 1987 Barkett - Calculator-computer for calculating infusion rates over varying time intervals Calculator optimized for medical personnel
4715011 (none) December 4, 1984 December 22, 1987 Brittan Calculated Industries GradeMatic 1000 Grade averaging calculator Teacher grading calculator
4737911 Nelson H. Shapiro June 7, 1985 April 12, 1988 Freeman - Process for electronically maintaining financial records, especially for checkbook balancing and rectification Checkbook calculator with magnetic card reader to input account balance data from bank
4744044 Electronic Teacher's Aids, Inc. June 20, 1986 May 10, 1988 Stover - Hand-held calculator for dimensional calculations Yard, feet, inch, fraction of inch, metric dimensions calculator
4796214 Photo Audio Consumer Electronics Marketing Corp. January 9, 1986 January 3, 1989 Fisherman - Integral calculator and address book Thin LCD calculator forms front cover of address booklet; sheet magnet back cover attracted to back of calculator to keep booklet closed
4800514 (none) May 28, 1987 January 24, 1989 Earle - Electronic graphic arts proportional calculator Calculates percentage reductions or enlargements for reproduction
4807170 (none) March 25, 1986 February 21, 1989 Kulli - Drug dose rate calculator -
4820908 Limax Electronics Co., Ltd. June 21, 1988 April 11, 1989 Wei - Combined calculator and puzzle game device Sliding puzzle pieces can be pushed as calculator keys
4831538 Aviation Supplies and Academics December 8, 1986 May 16, 1989 Cucchiari ASA CX-1 Pathfinder Flight Computer Hand-held navigation and flight performance computer -
4868772 (none) April 18, 1988 September 19, 1989 Collard - Earned run and batting average calculator Uses National Semiconductor MM5736 calculator chip
4872112 (none) July 25, 1988 October 3, 1989 Hungerford - Recipe calculator Calculator for increasing or decreasing recipe
4910696 (none) January 27, 1988 March 20, 1990 Grossman - Computerized personal portable account register Checkbook calculator
5018084 (none) January 30, 1989 May 21, 1991 Frank - Darkroom calculator Performs various darkroom photography calculations; had temperature probe and light sensor inputs
5050115 (none) December 15, 1986 September 17, 1991 Matsuda - Electronic calculator Yard, feet, inch, and fraction of inch display of fractions
5050312 RJP Intl. Ltd. May 16, 1988 September 24, 1991 McCannon - Graphic calculator Linear display for displaying ruler rulings
5101368 (none) June 20, 1988 March 31, 1992 Kaplan - Conversion calculator Metric/kitchen conversion calculator
5134692 Hiromori Inc. May 23, 1989 July 28, 1992 Hiromori - Combined electronic calculator and abacus with deflective guide bars -
5138566 (none) October 1, 1990 August 11, 1992 Comforti - Fractiona/decimal/digital converting calculator Feet, inch, fraction of inch calculator
5150315 (none) September 1, 1988 September 22, 1992 Katzin - Electrical resistor value decoding calculator -
5233547 NCR Corp. November 12, 1991 August 3, 1993 Kapp - Electronic checking account apparatus and method having a digitizer to receive information as a check is being written Checkbook calculator/register with character recognition
5233552 (none) November 26, 1991 August 3, 1993 Brittan Calculated Industries GradeMatic 1000 Grade averaging calculator Teacher grading calculator
5258935 (none) March 30, 1990 November 2, 1993 Ure - Self-inputing checkbook accounting device Checkbook calculator with handwriting recognition
5272653 (none) October 13, 1992 December 21, 1993 Meta - Multilane keyboard for inch calculations Special keyboard for feet, inch, fraction of inch calculator
5299295 Balenz, Inc. March 12, 1991 March 29, 1994 Kim - Method and apparatus for electronically viewing, printing and registering checks Checkbook calculator with printer
5303291 Fujitsu Ltd. September 7, 1990 April 12, 1994 Takagi - Portable telephone having a detachable functional module Flip-phone with calculator built into keypad cover
5335273 Fujitsu Ltd. September 7, 1990 August 2, 1994 Takagi - Portable telephone and multifunction protective housing therefor Flip-phone with calculator built into keypad cover
5485410 (none) April 25, 1994 January 16, 1996 Mastromattei - Measurement calculator Calculator capable of performing English unit calculations affixed to a tape measure
5630664 (none) December 20, 1995 May 20, 1997 Farrelly - Hand held apparatus for performing medical calculations -
5729479 Diet-Deal Ltd. September 14, 1995 March 17, 1998 Golan - Multifunction diet calculator -
5828587 (none) May 6, 1997 October 27, 1998 Bedol - Attachment apparatus for checkbook cover and method of use thereof Thin calculator and checkbook cover
5886331 (none) November 18, 1996 March 23, 1999 Lyons - Electronic calculator for determining truck driver log book values -
6167412 Agilent Technologies, Inc. July 14, 1998 December 26, 2000 Simons - Handheld medical calculator and medical reference device Appears to be based on HP-48G platform
6295533 Western Wood Products Association November 14, 1997 September 25, 2001 Cheung - Calculator for determining sizes and spans of wooden structural supports -
6324557 CCL Products Enterprises, Inc. March 30, 1999 November 27, 2001 Chan - Combination exerciser gripper and calculator Calculator with spring hand grips for exercising; calculator counts number of compressions
6687720 David L. Simmons September 5, 2000 February 3, 2004 Colver - Percentage and average calculator with expanded display Grade calculator for teachers
6712614 (none) February 7, 2001 March 30, 2004 Henderson - Abacus calculator -
6910055 Shin-Jiuh Corp. August 30, 2001 June 21, 2005 Chou - Calculator device for enabling a keypad to function as both a keypad and a calculator Auxiliary numeric keypad is also a calculator
6944638 (none) November 14, 2001 September 13, 2005 Putman - Medication dosage calculator -
6960988 Long Range Systems, Inc. June 14, 2001 November 1, 2005 Blink - Multi-function customer satisfaction survey device Calculator, built into tip tray, presents survey questions to restaurant customers
6978286 Francis Mathis, Inc. August 27, 2002 December 20, 2005 Frabcus - Handheld medication dosage calculator -
7096239 (none) December 23, 2003 August 22, 2006 Bihun - Trigonometry calculator Performs calculations for unknown parameters of plane triangles
7099905 (none) May 10, 2003 August 29, 2006 Straus - Novelty calculator system for amusement Calculator displays wrong answers to surprise unsuspecting users
7124933 (none) June 29, 2004 October 24, 2006 Deanna - Agricultural converter calculator Bushel-weight conversions for selected crops

Notes:

1 Where multiple inventors, only first inventor's name is listed.


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Last updated November 5, 2006