Patent US3090923A successfully refreshed from Google Patents.
US3090923A
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Logic system, using waves distinguishable as to frequency
Assignee: International Business Machines Corp
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Filing: 1958-02-17
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Granted: 1963-05-21
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Expires: 1978-02-17
Abstract
No abstract record available.
Inventors
- 👤 Hermann P Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:33
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/388; H; H01; H01P; H01P1/00; H01P1/10; H01P1/15; H03; H03K; H03K17/00; H03K17/51; H03K17/74; H03K19/00; H04; H04L; H04L27/00; H04L27/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
174 words
IN A LOGIC SYSTEM IN WHICH WAVES DISTINGUISHABLE AS TO FREQUENCY REPRESENT DIFFERENT INFORMATION, FIRST AND SECOND INPUT TERMINALS FOR INFORMATION-REPRESENTING WAVES, A FILTER FOR SELECTING A WAVE COMPONENT OF FREQUENCY FO CONNECTED TO ONE OF SAID INPUT TERMINALS, A FIRST MIXER CONNECTED TO THE OUTPUT OF SAID FILTER AND ALSO TO SAID SECOND INPUT TERMINAL, A FILTER FOR SELECTING A WAVE COMPONENT OF FREQUENCY FO CONNECTED TO THE SECOND OF SAID INPUT TERMINALS, A SECOND MIXER CONNECTED TO THE OUTPUT OF SAID LAST-MENTIONED FILTER AND ALSO TO SAID FIRST INPUT TERMINAL FOR PRODUCING SUM AND DIFFERENCE COMPONENTS, AND FILTER MEANS FOR SELECTING A WAVE COMPONENT OF A PREDETERMINED ONE OF SAID SUM AND DIFFERENCE FREQUENCIES CONNECTED TO THE OUTPUT TERMINALS OF SAID MIXERS, WHEREBY AN INPUT WAVE OF FREQUENCY FO APPLIED TO ONE OF SAID INPUT TERMINALS AND AN INPUT WAVE OF FREQUENCY F1 APPLIED TO THE OTHER OF SAID INPUT TERMINALS ARE NECESSARY IN WAVE ORDER TO PRODUCE AN OUTPUT WAVE OF A PREDETERMINED FREQUENCY AT THE OUTPUT OF SAID FILTER MEANS.
References Cited (Backward Citations)
US2666141A
Cited
US2499279A
Cited
US2775712A
Cited
US2719670A
Cited
US2756329A
Cited
US2815488A
Cited
US2926850A
Cited
US2872646A
Cited
US3007643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |