US2194175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distortion reducing arrangement
Assignee: Telefunken AG
•
Filing: 1938-08-04
•
Granted: 1940-03-19
•
Expires: 1958-08-04
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:50
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H04; H04R; H04R3/00; H04R3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-03-19 | 1943-09-18 | 1944-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-19 | 1947-09-18 | 1948-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-19 | 1951-09-18 | 1952-03-19 | $7700.00 | Window Closed / Lapsed |