US3428760A
Expired / Lapsed
US
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Tape guide drum for helical scan magnetic recording with stationary heads mounted in said drum
Assignee: Nihon Victor KK
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Filing: 1965-06-15
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Granted: 1969-02-18
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Ichitaro Hayashi
- 👤 Yoshiro Nishiwaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/52; G11B5/53; G06; G06M; G06M3/00; G06M3/06; G06M3/062; G06M3/065; G11B15/00; G11B15/18; G11B15/1808; G11B15/60; G11B15/61; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |