US3368032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recorder having bias amplitude varied as a function of the recorded signal
Assignee: Ampex Corp
•
Filing: 1964-03-09
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Granted: 1968-02-06
•
Expires: 1984-03-09
Abstract
No abstract record available.
Inventors
- 👤 Beverley R Gooch
- 👤 Gyi Maung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:07
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)
US3180929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |