US2632147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system employing pulse code modulation
Assignee: AT&T Inc
•
Filing: 1949-02-09
•
Granted: 1953-03-17
•
Expires: 1969-02-09
Abstract
No abstract record available.
Inventors
- 👤 Milton E Mohr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2013671A
Cited
US2114255A
Cited
US2207744A
Cited
US2139655A
Cited
US2224677A
Cited
US2483400A
Cited
US2463535A
Cited
US2458652A
Cited
US2473691A
Cited
US2552619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |