Patent US3020751A successfully refreshed from Google Patents.
US3020751A
Expired / Lapsed
US
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Wide frequency range electromechanical vibrator
Assignee: Individual
•
Filing: 1956-08-29
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Granted: 1962-02-13
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Expires: 1976-08-29
Abstract
No abstract record available.
Inventors
- 👤 Robert J Wohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0611
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1693806A
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US2101272A
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US2461543A
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US2453521A
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US2625035A
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US2661622A
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US2593031A
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US2706400A
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US2751512A
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US2776560A
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US2890584A
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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) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |