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US2819089A
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Recording method using translating head and stylus
Assignee: Dictaphone Corp
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Filing: 1952-01-11
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Granted: 1958-01-07
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Expires: 1972-01-11
Abstract
No abstract record available.
Inventors
- 👤 Harry A Williams
- 👤 John H Sherwood
- 👤 Samuel A Oliva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:06
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46; G11B3/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941010A
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US919856A
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US1345756A
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US2083815A
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US2347623A
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US2514379A
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US2525968A
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US2581765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |