US3183456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency modulation apparatus
Assignee: AT&T Inc
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Filing: 1961-03-17
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Granted: 1965-05-11
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
- 👤 Seidel Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:35
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H03C; H03C3/00; H03C3/02; H03C3/09; H03C3/10; H03C3/12; H03C3/22; H03C7/00; H03C7/02; H03C7/025; H03C7/027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
APPARATUS FOR TRANSLATING INPUT SIGNAL INFORMATION INTO A HIGH INDEX FREQUENCY MODULATED OUTPUT SIGNAL COMPRISING MEANS FOR GENERATING TWO SYNCHONOUSLY RELATED VARIABLE FREQUENCY OSCIALLATIONS, MEANS FOR PRODUCING EQUAL BUT OPPOSITE CHANGES IN THE FREQUENCIES OF SAID OSCILLATIONS IN RESPONSE TO INPUT INFORMATION, MEANS FOR MIXING SAID OSCILLATIONS, AND MEANS FOR ADBSTRACTING FROM SAID MIXING MEANS ENERGY OF A FREQUENCY CORRESPONDING TO THE DIFFERENCE BETWEEN THE FREQUENCIES OF SAID OSCILLATIONS.
Claim 2
Dependent Claim
69 words
APPARATUS FOR TRANSLATING INPUT SIGNAL INFORMATION INTO A HIGH INDEX FREQUENCY MODULATED OUTPUT SIGNAL COMPRISING MEANS FOR GENERATING TWO SYNCHONOUSLY RELATED VARIABLE FREQUENCY OSCIALLATIONS, MEANS FOR PRODUCING EQUAL BUT OPPOSITE CHANGES IN THE FREQUENCIES OF SAID OSCILLATIONS IN RESPONSE TO INPUT INFORMATION, MEANS FOR MIXING SAID OSCILLATIONS, AND MEANS FOR ADBSTRACTING FROM SAID MIXING MEANS ENERGY OF A FREQUENCY CORRESPONDING TO THE DIFFERENCE BETWEEN THE FREQUENCIES OF SAID OSCILLATIONS.
References Cited (Backward Citations)
US2719223A
Cited
US2962676A
Cited
US3018443A
Cited
US2992398A
Cited
US3001143A
Cited
US2970275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |