US2712898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for analysis and comparison of recordings
Assignee: Compagnie des Machines Bull SA
•
Filing: 1951-07-16
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Granted: 1955-07-12
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Expires: 1971-07-16
Abstract
No abstract record available.
Inventors
- 👤 Knutsen Knut Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:58
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/1092; G06F; G06F7/00; G06F7/02; G06F7/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985035A
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US2224646A
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US2251828A
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US2247684A
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US2395482A
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US2580270A
Cited
US2586963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |