Patent US3474194A successfully refreshed from Google Patents.
US3474194A
Expired / Lapsed
US
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Printed phonotrack system with bandwidth reduction
Assignee: GEORGE R KINZIE JR
•
Filing: 1966-02-03
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Granted: 1969-10-21
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Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Sidney Lees
- 👤 George R Kinzie Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:32
CPC Classifications
G; G11; G11B; G11B11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396178A
Cited
US1812405A
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US1951454A
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US2006890A
Cited
US2181265A
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US2369572A
Cited
US3277245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |