Patent US2744165A successfully refreshed from Google Patents.
US2744165A
Expired / Lapsed
US
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Head construction for magnetic recorders and reproducers
Assignee: Shure Inc
•
Filing: 1950-05-29
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Granted: 1956-05-01
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Expires: 1970-05-29
Abstract
No abstract record available.
Inventors
- 👤 Benjamin B Bauer
- 👤 Jr Lee Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |