Patent US2171587A successfully refreshed from Google Patents.
US3249746A
Expired / Lapsed
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Data processing apparatus
Assignee: RCA Corp
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Filing: 1961-10-17
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Granted: 1966-05-03
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Expires: 1981-10-17
Abstract
No abstract record available.
Inventors
- 👤 Walter A Helbig
- 👤 William E Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:46
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/505; G06F2207/00; G06F2207/38; G06F2207/3804; G06F2207/386; G06F2207/3876
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
142 words
A HIGH SPEED ADDER COMPRISING ( SEPARATE SUM STAGES EACH ARRANGED FOR COMBINING TWO OPERAND DIGITS OF THE LIKE SIGNIFICANCE AND A NEXT LEAST SIGNIFICANT CARRY DIGIT TO PRODUCE A SUM SIGNAL, AND N-1 CARRY RIPPLE GATES CONNECTED IN SERIES WITH EACH OTHER LEAST SIGNIFICANT TO MOST SIGNIFICANT FOR TRANSMITTING A RECEIVED CARRY SIGNAL TO THE NEXT HIGHER ORDER GATE AND TO THE NEXT HIGHER ORDER SUM STAGE OR FOR GENERATING A NEW CARRY SIGNAL IN ACCORDANCE WITH SAID APPLIED OPERAND SIGNALS, ALTERNATE ONES OF SAID CARRY GATES PRODUCING ONE POLARITY SIGNAL REPRESENTING THE PRESENCE OF A CARRY SIGNAL AND THE OTHER ALTERNATE ONES OF SAID CARRY GATES PRODUCING ANOTHER DIFFERENCE SIGNAL REPRESENTING THE INVERSE OF A CARRY SIGNAL SAID ALTERNATE GATES INCLUDIONG A FIRST LOGIC CIRCUIT FOR COMBINING OPERAND SIGNALS, A SECOND LOGIC CIRCUIT FOR COMBINING THE COMPLEMENTS OF SAID OPER-
References Cited (Backward Citations)
US2988277A
Cited
US2879001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |