Patent US3138703A successfully refreshed from Google Patents.
US3138703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full adder
Assignee: International Business Machines Corp
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Filing: 1959-12-29
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Granted: 1964-06-23
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Expires: 1979-12-29
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Maley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:47
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/505; G06F7/5052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
269 words
A BINARY FULL ADDER CELL, COMPRISING A FIRST SET OF THREE INPUT TERMINALS FOR RECEIVING, RESPECTIVELY, INPUT SIGNALS REPRESENTATIVE OF AN ADDEND, AN AUGEND AND A PREVIOUS CARRY DIGIT, A SECOND SET OF THREE INPUT TERMINALS FOR RECEIVING, RESPECTIVELY, INPUT SIGNALS REPRESENTATIVE OF THE COMPLEMENT OF SAID ADDEND, AUGEND AND PREVIOUS CARRY DIGIT, FIRST, SECOND, THIRD, FOURTH, FIFTH, SIXTH AND SEVENTH LOGIC OR CIRCUIT BLOCKS, EACH OF SAID OR CIRCUIT BLOCKS HAVING TWO INPUT TERMINALS AND A TRUE OUTPUT TERMINAL, FIRST, SECOND AND THIRD LOGIC AND CIRCUIT BLOCKS OF THE TWO-INPUT TYPE, SAID FIRST AND CIRCUIT HAVING A TRUE OUTPUT AND A COMPLEMENT OUTPUT, SAID SECOND AND CIRCUIT HAVING A TRUE OUTPUT, AND SAID THIRD AND CIRCUIT HAVING A COMPLEMENT OUTPUT, A FOURTH LOGIC AND CIRCUIT BLOCK OF THE THREE-INPUT TYPE, SAID FOURTH AND CIRCUIT HAVING A TRUE OUTPUT THE ADDEND AND AUGEND INPUT TERMINALS BEING CONNECTED TO THE INPUTS OF SAID FIRST OR CIRCUIT BLOCK, THE CARRY DIGIT INPUT TERMINAL BEING CONNECTED TO ONE INPUT OF SAID FOURTH OR CIRCUIT BLOCK, THE COMPLEMENT ADDEND AND COMPLEMENT AUGEND INPUT TERMINALS BEING CONNECTED TO THE INPUTS OF SAID SECOND OR CIRCUIT BLOCK, THE COMPLEMENT CARRY DIGIT INPUT TERMINAL BEING CONNECTED TO ONE INPUT OF SAID THIRD OR CIRCUIT BLOCK, THE OUTPUTS OF SAID FIRST AND SECOND OR CIRCUIT BLOCKS BEING CONNECTED TO THE INPUTS OF SAID FIRST AND CIRCUIT BLOCK, THE TRUE OUTPUT OF SAID FIRST AND CIRCUIT BLOCK BEING CONNECTED TO THE OTHER INPUT OF SAID FOURTH OR CIRCUIT BLOCK AND THE COMPLEMENT OUTPUT OF SAID FIRST AND CIRCUIT BLOCK BEING CONNECTED TO THE OTHER INPUT OF SAID THIRD
Claim 2
Dependent Claim
269 words
A BINARY FULL ADDER CELL, COMPRISING A FIRST SET OF THREE INPUT TERMINALS FOR RECEIVING, RESPECTIVELY, INPUT SIGNALS REPRESENTATIVE OF AN ADDEND, AN AUGEND AND A PREVIOUS CARRY DIGIT, A SECOND SET OF THREE INPUT TERMINALS FOR RECEIVING, RESPECTIVELY, INPUT SIGNALS REPRESENTATIVE OF THE COMPLEMENT OF SAID ADDEND, AUGEND AND PREVIOUS CARRY DIGIT, FIRST, SECOND, THIRD, FOURTH, FIFTH, SIXTH AND SEVENTH LOGIC OR CIRCUIT BLOCKS, EACH OF SAID OR CIRCUIT BLOCKS HAVING TWO INPUT TERMINALS AND A TRUE OUTPUT TERMINAL, FIRST, SECOND AND THIRD LOGIC AND CIRCUIT BLOCKS OF THE TWO-INPUT TYPE, SAID FIRST AND CIRCUIT HAVING A TRUE OUTPUT AND A COMPLEMENT OUTPUT, SAID SECOND AND CIRCUIT HAVING A TRUE OUTPUT, AND SAID THIRD AND CIRCUIT HAVING A COMPLEMENT OUTPUT, A FOURTH LOGIC AND CIRCUIT BLOCK OF THE THREE-INPUT TYPE, SAID FOURTH AND CIRCUIT HAVING A TRUE OUTPUT THE ADDEND AND AUGEND INPUT TERMINALS BEING CONNECTED TO THE INPUTS OF SAID FIRST OR CIRCUIT BLOCK, THE CARRY DIGIT INPUT TERMINAL BEING CONNECTED TO ONE INPUT OF SAID FOURTH OR CIRCUIT BLOCK, THE COMPLEMENT ADDEND AND COMPLEMENT AUGEND INPUT TERMINALS BEING CONNECTED TO THE INPUTS OF SAID SECOND OR CIRCUIT BLOCK, THE COMPLEMENT CARRY DIGIT INPUT TERMINAL BEING CONNECTED TO ONE INPUT OF SAID THIRD OR CIRCUIT BLOCK, THE OUTPUTS OF SAID FIRST AND SECOND OR CIRCUIT BLOCKS BEING CONNECTED TO THE INPUTS OF SAID FIRST AND CIRCUIT BLOCK, THE TRUE OUTPUT OF SAID FIRST AND CIRCUIT BLOCK BEING CONNECTED TO THE OTHER INPUT OF SAID FOURTH OR CIRCUIT BLOCK AND THE COMPLEMENT OUTPUT OF SAID FIRST AND CIRCUIT BLOCK BEING CONNECTED TO THE OTHER INPUT OF SAID THIRD
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |