Patent US3395625A successfully refreshed from Google Patents.
US3476103A
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US
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Electrical amplifier with compensating circuit for measuring purposes,particularly for electrocardiographs
Assignee: Siemens AG
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Filing: 1966-09-15
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Granted: 1969-11-04
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Heinrich Stenger
- 👤 Herbert Wilimzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:21
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; A; A61; A61B; A61B5/00; A61B5/24; A61B5/30; A61B5/307; A61B5/308; Y; Y10; Y10S; Y10S128/00; Y10S128/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |