Patent US2237374A successfully refreshed from Google Patents.
Patent US3244847A successfully refreshed from Google Patents.
US3244847A
Expired / Lapsed
US
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Manually operated keyboard switch in a stationary mount with guided shaftway
Assignee: Navigation Computer Corp
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Filing: 1964-05-22
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Granted: 1966-04-05
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Expires: 1984-05-22
Abstract
No abstract record available.
Inventors
- 👤 Adolph C Erpel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:41
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/50; H01H13/00; H01H13/02; H01H13/12; H01H1/12; H01H1/14; H01H1/24; H01H1/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1531347A
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US1723242A
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CH238218A
Cited
US2523768A
Cited
US2567421A
Cited
US2648731A
Cited
US2835754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |