Patent US2977329A successfully refreshed from Google Patents.
Patent US3293541A successfully refreshed from Google Patents.
US3293541A
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US
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Magnetic sensing device
Assignee: North American Aviation Corp
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Filing: 1964-04-02
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Granted: 1966-12-20
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Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Yujiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:40
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/40; G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/37; G11B5/376; H10D99/00
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |