US2989597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High fidelity sound translating apparatus
Assignee: Individual
•
Filing: 1955-06-30
•
Granted: 1961-06-20
•
Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 John A Victoreen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:35
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/04; H04R1/00; H04R1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2001537A
Cited
GB241343A
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GB449041A
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US2291246A
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US2320837A
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US2406119A
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US2437088A
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US2411891A
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US2509215A
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US2521423A
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US2564425A
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US2533516A
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US2543673A
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US2611035A
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US2696527A
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US2652460A
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US2768702A
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US2833868A
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US2775309A
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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) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |