US2593694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave analyzer for determining fundamental frequency of a complex wave
Assignee: AT&T Inc
•
Filing: 1948-03-26
•
Granted: 1952-04-22
•
Expires: 1968-03-26
Abstract
No abstract record available.
Inventors
- 👤 Peterson Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
G; G10; G10L; G10L25/00; G10L25/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2183248A
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US1994232A
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US2151091A
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US2176742A
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US2243527A
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US2396072A
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US2428021A
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US2443603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |