US3308281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subtracting and dividing computer
Assignee: US Philips Corp
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Filing: 1964-11-12
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Granted: 1967-03-07
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Crowther Gerald Offley
- 👤 Deli George Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:10
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F7/4915; G06F7/4917; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/027; G06F7/4912; G06F7/498; G06F2207/00; G06F2207/491; G06F2207/49125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A COMPUTING MACHINE COMPRISING AN ACCUMULATOR STORE HAVING A CHAIN OF DIGIT STORING COLD CATHODE STEPPING TUBES, A SOURCE OF COUNTING PULSES, MEANS APPLYING SAID COUNTING PULSES TO SAID ACCUMULATOR STORE FOR STORING A FIRST NUMBER THEREIN, AN INPUT STORE HAVING A SERIES OF DIGIT STORING COLD CATHODE STEPPING TUBES, MEANS APPLYING SAID COUNTING PULSES TO SAID INPUT STORE FOR STORING A SECOND NUMBER THEREIN, AND SUBSTRACTING MEANS FOR SUBTRACTING SAID SECOND NUMBER FROM SAID FIRST NUMBER BY NINES COMPLEMENT ADDITION, SAID SUBTRACTING MEANS COM-
Claim 2
Dependent Claim
85 words
A COMPUTING MACHINE COMPRISING AN ACCUMULATOR STORE HAVING A CHAIN OF DIGIT STORING COLD CATHODE STEPPING TUBES, A SOURCE OF COUNTING PULSES, MEANS APPLYING SAID COUNTING PULSES TO SAID ACCUMULATOR STORE FOR STORING A FIRST NUMBER THEREIN, AN INPUT STORE HAVING A SERIES OF DIGIT STORING COLD CATHODE STEPPING TUBES, MEANS APPLYING SAID COUNTING PULSES TO SAID INPUT STORE FOR STORING A SECOND NUMBER THEREIN, AND SUBSTRACTING MEANS FOR SUBTRACTING SAID SECOND NUMBER FROM SAID FIRST NUMBER BY NINES COMPLEMENT ADDITION, SAID SUBTRACTING MEANS COM-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |