Patent US2610257A successfully refreshed from Google Patents.
US2610257A
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Magnetic record volume control
Assignee: Warner Bros Entertainment Inc
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Filing: 1949-12-22
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Granted: 1952-09-09
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Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Wissmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
G; G11; G11B; G11B5/00; Y; Y10; Y10T; Y10T74/00; Y10T74/15
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US873541A
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US873042A
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US893277A
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US1846531A
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US1847860A
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US1949840A
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US1828190A
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US2275961A
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FR881562A
Cited
US2475694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |