US2496579A
Expired / Lapsed
US
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Sensing system for magnetically recorded signals
Assignee: International Business Machines Corp
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Filing: 1949-01-05
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Granted: 1950-02-07
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Expires: 1969-01-05
Abstract
No abstract record available.
Inventors
- 👤 Raymond E Cheney
- 👤 John L Wagner
- 👤 Robert E Lawhead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:44
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; B; B65; B65G; B65G47/00; B65G47/34; B65G47/46; B65G47/50; G01; G01D; G01D15/00; G01D15/12; G06; G06K; G06K1/00; G06K1/12; G06K7/00; G06K7/08; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-06 | 1953-08-08 | 1954-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-06 | 1957-08-08 | 1958-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-06 | 1961-08-08 | 1962-02-07 | $7700.00 | Window Closed / Lapsed |