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US2692379A
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Blocking oscillator magnetic recording device
Assignee: Individual
•
Filing: 1952-05-27
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Granted: 1954-10-19
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Expires: 1972-05-27
Abstract
No abstract record available.
Inventors
- 👤 Dolan H Toth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:07
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; G11B5/02; G11B5/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2351011A
Cited
US2475421A
Cited
US2590091A
Cited
US2540654A
Cited
US2535712A
Cited
US2608621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |