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USRE27734E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Warren wide band recording and reproducing system
Assignee: —
•
Filing: 1971-11-24
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Granted: 1973-08-14
•
Expires: 1991-11-24
Abstract
Abstract A TELEVISION SIGNAL TO BE RECORDED IS DIVIDED INTO ITS VIDEO AND AUDIO INFORMATION SIGNALS. THE VIDEO SIGNAL IS USED TO FREQUENCY MODULATE A CARRIER WAVE. THE RESULTANT FREQUENCY MODULATED CARRIER WAVE IS THEN ADDED TO THE AUDIO SIGNAL AND APPLIED TO A RECORDING HEAD FOR RECORDING ON A SINGLE TRACK OF A MAGNETIC TAPE.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:11
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/9201; H04N5/9202; H04N5/9204
Claims Analysis
Total Claims: 0
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |