US2781972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reading device controlled by magnetic record cards
Assignee: Compagnie des Machines Bull SA
•
Filing: 1952-05-06
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Granted: 1957-02-19
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Expires: 1972-05-06
Abstract
No abstract record available.
Inventors
- 👤 Chaimowicz Adam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:35
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/026; G06; G06K; G06K7/00; G06K7/08; G06K7/082; G06K7/083; G06K7/084; G11B5/00; G11B5/008; G11B5/00804; G11B5/00808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2084848A
Cited
US2254933A
Cited
US2501126A
Cited
US2496047A
Cited
US2508953A
Cited
US2584714A
Cited
US2643130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-19 | 1960-08-20 | 1961-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-19 | 1964-08-20 | 1965-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-19 | 1968-08-20 | 1969-02-19 | $7700.00 | Window Closed / Lapsed |