US2487244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for indicating sound pitch or voice inflection
Assignee: Individual
•
Filing: 1945-09-01
•
Granted: 1949-11-08
•
Expires: 1965-09-01
Abstract
No abstract record available.
Inventors
- 👤 Horvitch Gerard Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:37
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1738289A
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US1733605A
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US1835778A
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US2137888A
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US2152955A
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US2212431A
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US2368953A
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US2388531A
Cited
US2416353A
Cited
US2432123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |