US3474433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic tape readout assembly employing two sets of angularly displaced heads
Assignee: FRITZ A GUERTH
•
Filing: 1966-08-31
•
Granted: 1969-10-21
•
Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Fritz A Guerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:46
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2929670A
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US2902673A
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US2905521A
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US2938962A
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US3092815A
Cited
US2932002A
Cited
US3378825A
Cited
US3332059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |