Patent US1588513A successfully refreshed from Google Patents.
US2894685A
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US
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Servo-mechanism function generator utilizing an error voltage
Assignee: EMI Ltd
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Filing: 1950-09-12
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Granted: 1959-07-14
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Expires: 1970-09-12
Abstract
No abstract record available.
Inventors
- 👤 Spencer Rolf Edmund
- 👤 Stephenson Geoffrey Huson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:32
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/41; G05B19/4105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703280A
Cited
US1684138A
Cited
US1988458A
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US2415080A
Cited
US2425317A
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US2537083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |