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US2943804A
Expired / Lapsed
US
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Magnetic sound recording device
Assignee: Individual
•
Filing: 1956-09-24
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Granted: 1960-07-05
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Loewe Siegmund
- 👤 Zorn Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:00
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B15/44; G11B15/442; G11B27/00; G11B27/10; G11B27/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335277A
Cited
US2756279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |