Patent US3059347A successfully refreshed from Google Patents.
US3059347A
Expired / Lapsed
US
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Phonograph apparatus for foreign language instruction
Assignee: AUDIOTRONICS CORP
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Filing: 1959-07-20
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Granted: 1962-10-23
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Donald E Warner
- 👤 William E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1229142A
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US1897557A
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US2089165A
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US2109602A
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US2627555A
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US2704803A
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US2768234A
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US2876561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |