Patent US2129074A successfully refreshed from Google Patents.
US2129074A
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Automatic signal transmission control circuit
Assignee: Siemens and Halske AG
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Filing: 1935-02-21
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Granted: 1938-09-06
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Expires: 1955-02-21
Abstract
No abstract record available.
Inventors
- 👤 Thierbach Dietwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:50
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/001; H03G11/00; H03G11/004; H03G7/002; H03G7/004; H03G7/02; H03G9/00; H03G9/02; H03G9/04; H03G9/10; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10
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) | 1941-09-05 | 1942-03-07 | 1942-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-09-05 | 1946-03-07 | 1946-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-09-05 | 1950-03-07 | 1950-09-06 | $7700.00 | Window Closed / Lapsed |