Patent US2928078A successfully refreshed from Google Patents.
US2928078A
Expired / Lapsed
US
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Magnetic transducer
Assignee: International Business Machines Corp
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Filing: 1956-08-16
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Granted: 1960-03-08
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Expires: 1976-08-16
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Hagopian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/335; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2539876A
Cited
US2608621A
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US2768243A
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US2700703A
Cited
US2722569A
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US2704789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |