Patent US2617895A successfully refreshed from Google Patents.
US2617895A
Expired / Lapsed
US
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Electrical phonograph transducer with multiple styli
Assignee: Astatic Corp
•
Filing: 1948-10-05
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Granted: 1952-11-11
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Expires: 1968-10-05
Abstract
No abstract record available.
Inventors
- 👤 Belford C Angle
- 👤 Maurice M Palo
- 👤 Kelly Paul Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:47
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/16; H04R1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1503854A
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US1830801A
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US1992893A
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US2087135A
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US2320427A
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US2318308A
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US2295712A
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US2479894A
Cited
US2489379A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |