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US2935569A
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Time assignment speech interpolation system
Assignee: AT&T Inc
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Filing: 1957-09-26
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Granted: 1960-05-03
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Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Saal
- 👤 Welber Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:57
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2541932A
Cited
US2773934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |