| Patents for G06C 1 - Computing aids in which the computing members form at least part of the displayed result and are manipulated directly by hand, e.g. abacus, pocket adding device (778) |
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| 11/23/1988 | CN88201113U Combined abacus for hand calculation and using an abacus |
| 11/02/1988 | CN88202688U Rational number abacus |
| 10/04/1988 | US4775779 Slide rule for selecting material for constructing bearing |
| 08/24/1988 | CN88200925U Electronic counter for baby |
| 08/03/1988 | CN87214287U Fault locating rule for ultrasonic flaw detection |
| 07/27/1988 | CN87216211U Multi-function abacus with digit wheel |
| 07/27/1988 | CN87213010U Anti-slip abacus beads |
| 07/20/1988 | CN87200305U Popular calculator for applying nitrogenous fertilizer to rice field |
| 07/13/1988 | CN87212337U Abacus for timber volume list |
| 07/06/1988 | CN87212279U Three-beaded obacus |
| 06/22/1988 | CN87209843U Arithmetic exercise board |
| 06/22/1988 | CN87200873U Foldable magnetic abacus |
| 05/25/1988 | CN87211935U Mathematical intelligence magical cylinder |
| 05/25/1988 | CN87204704U Transfusion matrix unit for correcting acidosis |
| 05/18/1988 | CN87204067U Manual or electric multipurpose abacus |
| 05/04/1988 | CN86107116A 电子算盘 Electronic abacus |
| 04/20/1988 | CN87202891U Beads-free abacus with finger-press display |
| 04/20/1988 | CN87202391U Folding thin-framed abacus with elastic beads |
| 04/06/1988 | CN87208191U Electronic baby counter |
| 04/05/1988 | US4736093 Calculator for determining frequency matched set of golf clubs |
| 03/02/1988 | CN87211778U 折叠式算盘 Folding abacus |
| 03/02/1988 | CN86105144A Clinical x-ray threshold photographac ruller |
| 02/24/1988 | CN86210532U Multiplication fast counter |
| 02/10/1988 | CN86206613U Checker |
| 01/13/1988 | CN87209801U Abacus with count mark hurdle |
| 01/13/1988 | CN87200935U Stationery box with abacus |
| 01/06/1988 | CN86104461A 电子算盘 Electronic abacus |
| 12/16/1987 | CN86208154U Disassemble abacus |
| 12/02/1987 | CN86103426A Photoelectric calculator |
| 11/07/1987 | CN86207068U Hardness-test slide rule |
| 11/04/1987 | CN87200287U Resistance, capacitance and imaging calculating rule |
| 10/31/1987 | CN86210967U Six-bead addition abacus |
| 10/31/1987 | CN86210344U 计算玩具 Calculation toys |
| 08/26/1987 | CN86207207U Four quadrant superimposed abacus |
| 08/26/1987 | CN86103447A Abacus being able to carry and abdicate automatically |
| 07/29/1987 | CN86203091U Toy-type checking calculator |
| 07/29/1987 | CN86200016U New-style abacus and language thereof |
| 07/08/1987 | EP0227788A1 Duodecimal numbering system and its applications |
| 07/08/1987 | CN86201810U 彩色算盘 Color abacus |
| 03/11/1987 | CN85202013U Counter for addition and subtraction computing |
| 02/18/1987 | CN85106460A Multipurpose ruler for drafting and calculating |
| 02/11/1987 | CN86200641U Teaching abacus |
| 01/31/1987 | CN85101486A Electrical abacus |
| 01/15/1987 | WO1987000313A1 Duodecimal numbering system and its applications |
| 01/07/1987 | CN86203338U Simply and easily operated abacus |
| 12/31/1986 | CN85203093U Children calculator |
| 12/17/1986 | CN86204554U Bead-moving type electronic calculator |
| 12/16/1986 | US4629429 Abacus with each counter held in position by friction or magnetic attraction |
| 09/10/1986 | CN85203930U Multipurpose calculator for children |
| 07/02/1986 | CN85201327U Multifunction abacus with numbered record mark |
| 07/02/1986 | CN85100789A Calculating rule for electrocardiogram measuring |
| 06/25/1986 | CN85203581U Drawing and calculating multipurpose ruler |
| 06/25/1986 | CN85201980U Abacus with muti-way of carries and allocations. |
| 05/21/1986 | CN85200069U Time computer disk for traveling use |
| 04/30/1986 | CN85203040U Intellectual toy with calculator |
| 04/23/1986 | CN85202619U Musical abacus |
| 01/22/1986 | CN85201274U 游标算盘 Cursor abacus |
| 01/01/1986 | CN85200176U Magnetic teaching abacus |
| 10/10/1985 | CN85100979A Direct-inpptting calculator or computer with number-shape combined devices |
| 08/07/1985 | EP0150460A2 Toy cash register |
| 11/27/1984 | US4484402 Calendar |
| 11/21/1984 | EP0125836A2 Teaching aid |
| 05/29/1984 | US4450615 Method of fabricating a hand calculator |
| 12/06/1983 | US4419572 Check digit calculator |
| 10/12/1983 | EP0091218A2 Calendar |
| 05/03/1983 | US4381614 Calendar |
| 01/18/1983 | US4369357 Race computer |
| 01/11/1983 | US4368381 Numeral adding toy |
| 06/15/1982 | US4335300 Diet control apparatus and method |
| 03/30/1982 | US4322610 Recording device for golfer |
| 06/09/1981 | US4272674 Check digit calculator |
| 10/21/1980 | US4228604 Biorhythmic device |
| 08/19/1980 | US4218609 Educational mechanical calculator |
| 07/01/1980 | US4210093 Counting device |
| 07/19/1977 | US4037084 Decompression plan calculator |
| 05/17/1977 | US4023276 Diagnostic scale for interpretation of electrocardiogram |
| 02/01/1977 | US4006344 Mechanical binary number adding and subtracting apparatus |
| 08/17/1976 | US3974568 Drivers log device |