Patent US3759739A successfully refreshed from Google Patents.
Patent US3461249A successfully refreshed from Google Patents.
US3461249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-track tape drive system for reversing tape travel after cessation of intelligence signal output from all channels
Assignee: Sony Corp
•
Filing: 1966-02-07
•
Granted: 1969-08-12
•
Expires: 1986-02-07
Abstract
No abstract record available.
Inventors
- 👤 Yoshiaki Kamoji
- 👤 Shoichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:31
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/12; G11B15/18; G11B15/44; G11B15/444; G11B15/446; G11B15/448; G11B27/00; G11B27/10; G11B27/19; G11B27/22; G11B27/28; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |