Patent US2491944A successfully refreshed from Google Patents.
US2491944A
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Combination sound and visual reproduction apparatus
Assignee: Individual
•
Filing: 1946-12-19
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Granted: 1949-12-20
•
Expires: 1966-12-19
Abstract
No abstract record available.
Inventors
- 👤 Abrahams Mortimer
- 👤 Gould George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:49
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06; G09B5/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US996102A
Cited
US1482387A
Cited
US1584708A
Cited
US2038976A
Cited
US2066538A
Cited
US2088516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |