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Patent US2931023A successfully refreshed from Google Patents.
US2931023A
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Digital position indicator
Assignee: International Business Machines Corp
•
Filing: 1955-02-14
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Granted: 1960-03-29
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Expires: 1975-02-14
Abstract
No abstract record available.
Inventors
- 👤 Edward A Quade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:20
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2073; G01D5/25; G01D5/252; G06; G06M; G06M1/00; G06M1/27; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US739572A
Cited
US1102990A
Cited
US1972987A
Cited
US2435276A
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US2602660A
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US2508526A
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US2882524A
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US2672605A
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US2736881A
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US2717371A
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US2734182A
Cited
US2733860A
Cited
FR1071210A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |