Patent US2924138A successfully refreshed from Google Patents.
US2924138A
Expired / Lapsed
US
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Electronic synchronizing system for producing pitch discs and the like
Assignee: BALDWIN PIANO Co
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Filing: 1954-06-15
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Granted: 1960-02-09
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Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Edward M Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
H; H03; H03M; H03M1/00; G; G10; G10H; G10H3/00; G10H3/03; G10H3/06; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2144844A
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US2399421A
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US2585291A
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US2540922A
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US2512785A
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US2570775A
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US2680150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |