US2743878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic sound-recording and reproducing machine
Assignee: RCA Corp
•
Filing: 1952-04-01
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Granted: 1956-05-01
•
Expires: 1972-04-01
Abstract
No abstract record available.
Inventors
- 👤 Earl E Masterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:01
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B15/00; G11B15/02; G11B15/04; G11B15/18; G11B15/26; G11B15/28; G11B15/295; G11B15/43; G11B15/44; G11B15/442; G11B15/46; G11B15/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1848663A
Cited
GB270050A
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GB313672A
Cited
FR706197A
Cited
US1911338A
Cited
US2297242A
Cited
US2335277A
Cited
US2422143A
Cited
FR907783A
Cited
US2509500A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |