US2775460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Binaural recording system
Assignee: Individual
•
Filing: 1951-05-15
•
Granted: 1956-12-25
•
Expires: 1971-05-15
Abstract
No abstract record available.
Inventors
- 👤 Ian M Shivack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:17
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H04R17/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US908778A
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US1342442A
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US1262592A
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US1260586A
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US1276759A
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US1457313A
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US1520357A
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US1520378A
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US1877625A
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US1855150A
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US2458418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |