Patent US3207888A successfully refreshed from Google Patents.
US3207888A
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Electronic circuit for complementing binary coded decimal numbers
Assignee: International Business Machines Corp
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Filing: 1961-11-24
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Granted: 1965-09-21
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Expires: 1981-11-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Broce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:02
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/491; G06F2207/00; G06F2207/491; G06F2207/49105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A CIRCUIT FOR OBTAINING THE NINE''S COMPLIMENT OF A BINARY CODED DECIMAL NUMBER COMPRISING: A REGISTEWR HAVING AN INPUT AND AN OUTPUT; LOGIC MEANS; A COMPLEMENT INPUT LINE; MEANS FOR COUPLING SAID LOGIC MEANS TO SAID REGISTER TO SENSE THE CONDITION OF THE OUTPUT THEREOF; AND MEANS FOR COUPLING SAID COMPLEMENT INPUT LINE TO SAID LOGIC MEANS AND TO SAID REGISTER; SAID LOGIC MEANS RESPONSIVE TO A SINGLE PULSE ON SAID COMPLEMENT INPUT LINE TO GENERATE AN OUTPUT IN ACCORDANCE WITH THE SENSED OUTPUT OF SAID REGISTER WHICH GENERATED OUTPUT IS APPLIED TO SAID REGISTER INPUT SO THAT THE COMPLEMENT OF THE BINARY CODED DECIMAL NUMBER IS GENERATED IN SAID REGISTER.
Claim 2
Dependent Claim
111 words
A CIRCUIT FOR OBTAINING THE NINE''S COMPLIMENT OF A BINARY CODED DECIMAL NUMBER COMPRISING: A REGISTEWR HAVING AN INPUT AND AN OUTPUT; LOGIC MEANS; A COMPLEMENT INPUT LINE; MEANS FOR COUPLING SAID LOGIC MEANS TO SAID REGISTER TO SENSE THE CONDITION OF THE OUTPUT THEREOF; AND MEANS FOR COUPLING SAID COMPLEMENT INPUT LINE TO SAID LOGIC MEANS AND TO SAID REGISTER; SAID LOGIC MEANS RESPONSIVE TO A SINGLE PULSE ON SAID COMPLEMENT INPUT LINE TO GENERATE AN OUTPUT IN ACCORDANCE WITH THE SENSED OUTPUT OF SAID REGISTER WHICH GENERATED OUTPUT IS APPLIED TO SAID REGISTER INPUT SO THAT THE COMPLEMENT OF THE BINARY CODED DECIMAL NUMBER IS GENERATED IN SAID REGISTER.
References Cited (Backward Citations)
US2800276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |