Patent US2459904A successfully refreshed from Google Patents.
US2459904A
Expired / Lapsed
US
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Telegraph signal code translator
Assignee: AT&T Inc
•
Filing: 1943-12-09
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Granted: 1949-01-25
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Expires: 1963-12-09
Abstract
No abstract record available.
Inventors
- 👤 Edward F Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:52
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4923; H04L25/4925; H03; H03M; H03M7/00; H03M7/30; H03M7/40; H03M7/4025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1835281A
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US1927699A
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US1983905A
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US2046964A
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US2193213A
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US2116549A
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US2152010A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-25 | 1952-07-26 | 1953-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-25 | 1956-07-26 | 1957-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-25 | 1960-07-26 | 1961-01-25 | $7700.00 | Window Closed / Lapsed |