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US3377587A
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Train operation control system and method of operating the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1966-10-26
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Granted: 1968-04-09
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Expires: 1986-10-26
Abstract
No abstract record available.
Inventors
- 👤 Nakahara Tsuneo
- 👤 Kurauchi Noritaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:34
CPC Classifications
B; B61; B61L; B61L25/00; B61L25/02; B61L25/021; B61L3/00; B61L3/02; B61L3/08; B61L3/12; G; G01; G01S; G01S1/00; G01S1/02; H; H01; H01P; H01P3/00; H01P3/12; H01P3/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2702342A
Cited
US3246324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |