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US2972018A
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Noise reduction system
Assignee: RCA Corp
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Filing: 1953-11-30
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Granted: 1961-02-14
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Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Mones E Hawley
- 👤 Elvin D Simshauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:35
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/002; A; A61; A61F; A61F11/00; A61F11/06; A61F11/14; A61F11/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR762121A
Cited
US2043416A
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US2420933A
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US2501327A
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US2462532A
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US2616971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |