Patent US3056085A successfully refreshed from Google Patents.
US3056085A
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Communication system employing pulse code modulation
Assignee: AT&T Inc
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Filing: 1959-11-30
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Granted: 1962-09-25
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Expires: 1979-11-30
Abstract
No abstract record available.
Inventors
- 👤 Dennis B James
- 👤 Robert M Wolfe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:09
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/66; H03M1/74; H03M1/80; H03M1/802; H03M1/804
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2592308A
Cited
US2864079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-24 | 1966-03-26 | 1966-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-24 | 1970-03-26 | 1970-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-24 | 1974-03-26 | 1974-09-25 | $7700.00 | Window Closed / Lapsed |