US3454731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching mechanism of automatically reciprocating type magnetic tape recorder with selective interlocking between control knob and buttons
Assignee: Toshiba Corp
•
Filing: 1968-03-06
•
Granted: 1969-07-08
•
Expires: 1988-03-06
Abstract
No abstract record available.
Inventors
- 👤 Yasushi Hori
- 👤 Hisao Kodama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:48
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/48; G11B15/02; G11B15/44; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20207; Y10T74/20238
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2843686A
Cited
US2878601A
Cited
US2866865A
Cited
US3179753A
Cited
US3319483A
Cited
US3366342A
Cited
US3398329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |