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US3024988A
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Keyboard mechanism
Assignee: Monroe Calculating Machine Co
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Filing: 1959-07-01
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Granted: 1962-03-13
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Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Heinrich W Wagemann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:27
CPC Classifications
G; G06; G06C; G06C7/00; G06C7/02; G06C7/04; H; H03; H03J; H03J5/00; H03J5/24; H03J5/26; H03J5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1742524A
Cited
US2583377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |