Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5579869 | Secondary conductor of an elevator-driving linear induction motor | Toshiaki Ishii | 1996-12-03 |
| 5547059 | Linear motor elevator system | Eiki Watanabe, Toshiaki Ishii, Kazuhiko Sugita | 1996-08-20 |
| 5393941 | Controller for ropeless elevator | Toshiaki Ishii | 1995-02-28 |
| 5345047 | Joining segments of the secondary in a linear motor driven elevator apparatus | Toshiaki Ishii, Kazuhiko Sugita | 1994-09-06 |
| 5290975 | Door control and data display system | Masanori Tawada, Terumi Hirabayashi, Toshiyuki Kodera | 1994-03-01 |
| 5250765 | Apparatus for controlling elevator door | Terumi Hirabayashi, Masanori Tawada, Toshiyuki Kodera | 1993-10-05 |
| 5196656 | Elevator door control apparatus | Terumi Hirabayashi, Masanori Tawada, Toshiyuki Kodera | 1993-03-23 |
| 5175400 | Apparatus for controlling elevator door based on power source voltage | Terumi Hirabayashi, Masanori Tawada, Toshiyuki Kodera | 1992-12-29 |
| 5170865 | Apparatus for controlling an elevator door using a drive motor slip frequency signal | Terumi Hirabayashi, Masanori Tawada, Toshiyuki Kodera | 1992-12-15 |
| 5144101 | Control apparatus for elevator doors using velocity limiting circuits | Masanori Tawada, Terumi Hirabayashi, Toshiyuki Kodera | 1992-09-01 |
| 5139113 | Apparatus for detecting abnormalities in elevator motion | Terumi Hirabayashi, Masanori Tawada, Toshiyuki Kodera | 1992-08-18 |
| 5131506 | Door control system using drive motor torque signals | Masanori Tawada, Terumi Hirabayashi, Toshiyuki Kodera | 1992-07-21 |