Patent US2701280A successfully refreshed from Google Patents.
US2701280A
Expired / Lapsed
US
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Piezoelectric phonograph pickup
Assignee: EMI Ltd
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Filing: 1951-02-27
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Granted: 1955-02-01
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Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Chamberlain Allan Geoffrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:15
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H04R17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-31 | 1958-08-02 | 1959-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-31 | 1962-08-02 | 1963-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-31 | 1966-08-02 | 1967-02-01 | $7700.00 | Window Closed / Lapsed |