US3588333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for magnetically recording and reading a television signal
Assignee: Individual
•
Filing: 1967-03-21
•
Granted: 1971-06-28
•
Expires: 1987-03-21
Abstract
Abstract IN A VIDEO RECORDING SYSTEM FOR TELEVISION SIGNALS, THE SIGNALS ARE PROVIDED WITH A REFERENCE LEVEL (E.G. MIDWAY BETWEEN THE MAXIMUM AND MINIMUM LEVELS) DURING THE BACK PORCH OF THE SYNCHRONIZING PERIOD. THE CURRENT THROUGH THE MAGNETIC RECORDING HEAD IS SET TO BE ZERO AT THE REFERENCE LEVEL, IN THE REPRODUCING SYSTEM, THE OUTPUT OF THE REPRODUC- ING HEAD IS CLAMPED AT THE TIME OF OCCURRENCE OF THE REFERENCE LEVEL.
Inventors
- 👤 Edmond De Niet
- 👤 Pieter Damstra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:21
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/921
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |