Patent US2459346A successfully refreshed from Google Patents.
Patent US2761897A successfully refreshed from Google Patents.
US2761897A
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US
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Electronic device for automatically discriminating between speech and music forms
Assignee: Individual
•
Filing: 1951-11-07
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Granted: 1956-09-04
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Expires: 1971-11-07
Abstract
No abstract record available.
Inventors
- 👤 Jones Robert Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:09
CPC Classifications
H; H04; H04H; H04H60/00; H04H60/35; H04H60/37; G; G10; G10L; G10L25/00; G10L25/78; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03G3/26; H04H60/56; H04H60/58; G10H; G10H2210/00; G10H2210/031; G10H2210/046; Y; Y10; Y10S; Y10S358/00; Y10S358/908
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21151E
Cited
US2089637A
Cited
US2237457A
Cited
US2250596A
Cited
US2250144A
Cited
US2424216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |