US3471648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vocoder utilizing companding to reduce background noise caused by quantizing errors
Assignee: AT&T Inc
•
Filing: 1966-07-28
•
Granted: 1969-10-07
•
Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:46
CPC Classifications
G; G10; G10L; G10L19/00; G10L19/04; G10L19/16; G10L19/18; G10L19/24; H; H04; H04B; H04B1/00; H04B1/66; H04B1/667
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3124654A
Cited
US3127476A
Cited
US2953644A
Cited
US3052757A
Cited
US3109142A
Cited
US3139487A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |