Patent US2519488A successfully refreshed from Google Patents.
US2519488A
Expired / Lapsed
US
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Sound reproducing stylus
Assignee: Individual
•
Filing: 1945-02-26
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Granted: 1950-08-22
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Expires: 1965-02-26
Abstract
No abstract record available.
Inventors
- 👤 Edward L Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:39
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4957; Y10T29/49577
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1162285A
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US1792494A
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GB288279A
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GB291755A
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US1733608A
Cited
GB405541A
Cited
US2012134A
Cited
US2010867A
Cited
US2092428A
Cited
US2085741A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |