Patent US2875169A successfully refreshed from Google Patents.
Patent US2943148A successfully refreshed from Google Patents.
US2943148A
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US
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Apparatus for transmitting teleprinter characters
Assignee: Dr-Ing Rudolf Hell KG
•
Filing: 1955-04-04
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Granted: 1960-06-28
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Expires: 1975-04-04
Abstract
No abstract record available.
Inventors
- 👤 Hell Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
H; H04; H04L; H04L21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2560474A
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US2511121A
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US2567812A
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US2672944A
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US2729803A
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US2614169A
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US2759171A
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US2842616A
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US2784392A
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US2791310A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |