US3248529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full adder
Assignee: International Business Machines Corp
•
Filing: 1962-04-30
•
Granted: 1966-04-26
•
Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Fred K Buelow
- 👤 Hilsenrath Manfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:36
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/50; G06F7/501; G06F7/5013; H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/082; H03K19/086; G06F2207/00; G06F2207/38; G06F2207/48; G06F2207/4802; G06F2207/4818; G06F2207/4828
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
AN ADDER COMPRISING FIRST, SECOND AND THIRD CURRENT SWITCHES, EACH CURRENT SWITCH INCLUDING FIRST AND SECOND SIGNAL TRANSLATING ELEMENTS CONNECTED IN CASCADE RELATION, MEANS BIASING THE CURRENT SWITCHES SO THAT CORRESPONDING SIGNAL TRANSLATING ELEMENTS ARE CONDUCTING AND RESPOND TO DIFFERENT SIGNAL LEVELS. AN INPUT CIRCUIT CONNECTED TO ALL CURRENT SWITCHES AND ADAPTED TO PROVIDE FIRST, SECOND AND THIRD SIGNAL LEVELS, A LOAD CIRCUIT, MEANS CONNECTING THE LOAD CIRCUIT TO THE SECOND, FIRST AND SECOND SIGNAL TRANSLATING ELEMENTS OF THE FIRST, SECOND AND THIRD CURRENT SWITCHES, RESPECTIVELY, A SUM CIRCUIT CONNECTED TO THE FIRST SIGNAL TRANSLATING OF THE SECOND CURRENT SWITCH, THE SUM CIRCUIT PROVID-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |