Watanabe; Eiki
Patent Applications and Registrations
Patent applications and USPTO patent grants for Watanabe; Eiki.The latest application filed is for "hydraulic elevator control apparatus using vvvf to determine the electric drive motor rotational speed".
- Watanabe; Eiki - Inazawa JP
- Watanabe; Eiki - Aichi JP
| Patent | Date |
|---|---|
| Hydraulic elevator control apparatus using VVVF to determine the electric drive motor rotational speed Grant 5,131,507 - Watanabe July 21, 1 | 1992-07-21 |
| Drive control apparatus Grant 5,038,894 - Watanabe August 13, 1 | 1991-08-13 |
| Elevator controller Grant 4,979,593 - Watanabe , et al. December 25, 1 | 1990-12-25 |
| Control system for induction motor Grant 4,935,684 - Watanabe June 19, 1 | 1990-06-19 |
| Control apparatus for escalator Grant 4,748,394 - Watanabe May 31, 1 | 1988-05-31 |
| Apparatus for controlling an elevator Grant 4,678,063 - Kitaoka , et al. July 7, 1 | 1987-07-07 |
| Control apparatus for elevator Grant 4,666,020 - Watanabe May 19, 1 | 1987-05-19 |
| Control apparatus for elevator Grant 4,567,419 - Watanabe January 28, 1 | 1986-01-28 |
| Elevator control system Grant 4,516,665 - Watanabe May 14, 1 | 1985-05-14 |
| Elevator relevelling control apparatus Grant 4,337,846 - Yonemoto , et al. July 6, 1 | 1982-07-06 |
| Control system for D.C. electric motor Grant 4,288,729 - Anzai , et al. September 8, 1 | 1981-09-08 |
| Elevator traction machine Grant 4,287,551 - Watanabe September 1, 1 | 1981-09-01 |
| Emergency stop apparatus for electric elevators Grant 4,284,175 - Ishii , et al. August 18, 1 | 1981-08-18 |
| Elevator landing control apparatus Grant 4,194,594 - Ishii , et al. March 25, 1 | 1980-03-25 |
| Elevator safety device Grant 4,133,413 - Watanabe January 9, 1 | 1979-01-09 |
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