Patent US3011029A successfully refreshed from Google Patents.
US3011029A
Expired / Lapsed
US
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Magnetic drum translator for automatic toll switching center
Assignee: AT&T Inc
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Filing: 1954-03-25
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Granted: 1961-11-28
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Expires: 1974-03-25
Abstract
No abstract record available.
Inventors
- 👤 Harley A Henning
- 👤 Jacobitti Edward
- 👤 Benjamin F Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-27 | 1965-05-29 | 1965-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-27 | 1969-05-29 | 1969-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-27 | 1973-05-29 | 1973-11-28 | $7700.00 | Window Closed / Lapsed |