US2950352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for recording and reproducing signal waves
Assignee: Rensselaer Polytechnic Institute
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Filing: 1953-08-26
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Granted: 1960-08-23
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Expires: 1973-08-26
Abstract
No abstract record available.
Inventors
- 👤 Hans B Belck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:02
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0007; G01; G01V; G01V1/00; G01V1/24; G11B20/00; G11B20/02; G11B20/08; H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2468058A
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US2432204A
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US2543736A
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US2629857A
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US2744959A
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US2724740A
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US2756404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |