Patent US2910546A successfully refreshed from Google Patents.
US2910546A
Expired / Lapsed
US
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Loud speaker assembly
Assignee: Individual
•
Filing: 1954-02-24
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Granted: 1959-10-27
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Expires: 1974-02-24
Abstract
No abstract record available.
Inventors
- 👤 Carl A Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:13
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/02; H04R1/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1941476A
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US1886816A
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US2020211A
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US2155474A
Cited
GB451754A
Cited
US2295527A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |