Patent US2152655A successfully refreshed from Google Patents.
US3499124A
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Fm recording and reproducing arrangement with single carrier and proportional compensation
Assignee: International Business Machines Corp
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Filing: 1966-11-07
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Granted: 1970-03-03
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Expires: 1986-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald Wortzman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:24
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/333; A61B5/336; G; G06; G06G; G06G7/00; G06G7/48; G06G7/60; G11; G11B; G11B20/00; G11B20/22; G11B20/225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |