Patent US2453336A successfully refreshed from Google Patents.
Patent US3428762A successfully refreshed from Google Patents.
US3428762A
Expired / Lapsed
US
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Dropout compensator with single-level signal storage
Assignee: STC PLC
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Filing: 1965-12-08
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Granted: 1969-02-18
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Expires: 1985-12-08
Abstract
No abstract record available.
Inventors
- 👤 William Keith Elliott Geddes
- 👤 Eric Raymond Rout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:27
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
APPARATUS FOR THE REPRODUCTION OF SIGNALS FROM MAGNETIC RECORDS, COMPRISING A REPLAY HEAD FOR GENERATING FROM A MAGNETIC RECORD AN OSCILLATION FREQUENCY-MODULATED BY RECORDED SIGNALS, AN AMPLITUDE LIMITER COUPLED TO SAID REPLAY HEAD AND ADAPTED TO REMOVE AMPLITUDE VARIATIONS FROM SAID FREQUENCY-MODULATED OSCILLATION, A FREQUENCY DISCRIMINATOR COUPLED TO SAID AMPLITUDE LIMITER FOR DERIVING A MODULATION SIGNAL FROM SAID FREQUENCY-MODULATED OSCILLATION FROM SAID AMPLITUDE LIMITER, AN OUTPUT TERMINAL FOR RECEIVING SAID MODULATION SIGNAL, MEANS COUPLING SIAD FREQUENCY DISCRIMINATOR TO SAID OUTPUT TERMINAL, STORAGE MEANS FOR STORING A VOLTAGE DEPENDENT ON
Claim 2
Dependent Claim
89 words
APPARATUS FOR THE REPRODUCTION OF SIGNALS FROM MAGNETIC RECORDS, COMPRISING A REPLAY HEAD FOR GENERATING FROM A MAGNETIC RECORD AN OSCILLATION FREQUENCY-MODULATED BY RECORDED SIGNALS, AN AMPLITUDE LIMITER COUPLED TO SAID REPLAY HEAD AND ADAPTED TO REMOVE AMPLITUDE VARIATIONS FROM SAID FREQUENCY-MODULATED OSCILLATION, A FREQUENCY DISCRIMINATOR COUPLED TO SAID AMPLITUDE LIMITER FOR DERIVING A MODULATION SIGNAL FROM SAID FREQUENCY-MODULATED OSCILLATION FROM SAID AMPLITUDE LIMITER, AN OUTPUT TERMINAL FOR RECEIVING SAID MODULATION SIGNAL, MEANS COUPLING SIAD FREQUENCY DISCRIMINATOR TO SAID OUTPUT TERMINAL, STORAGE MEANS FOR STORING A VOLTAGE DEPENDENT ON
References Cited (Backward Citations)
US3329521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |