Patent US3530448A successfully refreshed from Google Patents.
US3530448A
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US
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Data reading,recording,and positioning system
Assignee: International Business Machines Corp
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Filing: 1968-01-15
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Granted: 1970-09-22
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Expires: 1988-01-15
Abstract
No abstract record available.
Inventors
- 👤 Douglas E Clancy
- 👤 George W Hobgood Jr
- 👤 Frederick T May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:21
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1215; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/084; G11B20/14; G11B20/1403; G11B20/1407; G11B20/1419; G11B20/18; G11B20/1816; G11B25/00; G11B25/04; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |