Hewlett-Packard Calculator Patents

HP CALCULATOR PATENTS

The following are some of the United States Patents granted to Hewlett-Packard for their calculator products.

DESKTOPS

Patent
Number Filed Granted Pages Size (KB) Description Firmware
Listing?

3623156 1969 May 26 1971 Nov 23 61 3,010 HP 9100 n/a

3641328 1969 May 21 1972 Feb 8 62 2,917 HP 9100 n/a

3839630 1971 Dec 27 1974 Oct 1 389 16,760 HP 9820 Yes

3859635 1971 Jun 15 1975 Jan 7 412 17,469 HP 9810 Yes

3971925 1974 Jun 6 1976 Jul 27 164 8,154 HP 9805 Yes

4012725 1974 May 30 1977 Mar 15 590 22,315 HP 9830 Yes

4028538 1974 Sep 30 1977 Jun 7 16 1,173 HP 9820 No

4063221 1974 Dec 23 1977 Dec 13 26 1,995 HP 9810 No

4075679 1975 Dec 8 1978 Feb 21 599 32,043 HP 9825 Yes

4089059 1975 Jul 21 1978 May 9 381 13,599 HP 9815 Yes

4178633 1977 Jun 1 1979 Dec 11 19 1,636 HP 9820 No

4180854 1977 Sep 29 1979 Dec 25 584 21,563 HP 9845 No

4281390 1979 Jun 25 1981 Jul 28 21 1,562 HP 9820 No

4366553 1980 Oct 24 1982 Dec 28 13 916 HP 9830 No

4437156 1981 Jan 21 1984 Mar 13 341 12,124 HP 9825 No

4455618 1981 Feb 20 1984 Jun 19 11 802 HP 9845 No

4615015 1982 Sep 29 1986 Sep 30 23 1,648 HP 9820 No

HANDHELDS

Patent
Number Filed Granted Pages Size (KB) Description Firmware
Listing?

3855461 1973 Aug 30 1974 Dec 17 7 393 HP 65 No

3863060 1972 Oct 30 1975 Jan 28 80 3,712 HP 80 Yes

3987290 1975 May 19 1976 Oct 19 10 522 HP 25 No

4001569 1975 Apr 8 1977 Jan 4 107 4,284 HP 45 Yes

4009379 1974 Dec 16 1977 Feb 22 55 2,692 HP 55 Yes

4035627 1975 Apr 8 1977 Jul 12 10 548 HP 45 No

4037092 1973 Nov 26 1977 Jul 19 8 390 HP 25 No

4059750 1975 Apr 8 1977 Nov 22 5 277 HP 45 No

4158285 1976 Feb 9 1979 Jun 19 151 7,207 HP-01 Yes

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Updated June 19, 2004