Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8839914 | Elevator system including fire evacuation priority | Masafumi Iwata, Masahiko Konishi, Kiyoji Kawai, Akihisa Miyajima | 2014-09-23 |
| 5329075 | Elevator door control apparatus | Terumi Hirabayashi, Masanori Tawada | 1994-07-12 |
| 5290975 | Door control and data display system | Masamoto Mizuno, Masanori Tawada, Terumi Hirabayashi | 1994-03-01 |
| 5250765 | Apparatus for controlling elevator door | Masamoto Mizuno, Terumi Hirabayashi, Masanori Tawada | 1993-10-05 |
| 5196656 | Elevator door control apparatus | Masamoto Mizuno, Terumi Hirabayashi, Masanori Tawada | 1993-03-23 |
| 5175400 | Apparatus for controlling elevator door based on power source voltage | Terumi Hirabayashi, Masamoto Mizuno, Masanori Tawada | 1992-12-29 |
| 5170865 | Apparatus for controlling an elevator door using a drive motor slip frequency signal | Masamoto Mizuno, Terumi Hirabayashi, Masanori Tawada | 1992-12-15 |
| 5144101 | Control apparatus for elevator doors using velocity limiting circuits | Masanori Tawada, Masamoto Mizuno, Terumi Hirabayashi | 1992-09-01 |
| 5139113 | Apparatus for detecting abnormalities in elevator motion | Masamoto Mizuno, Terumi Hirabayashi, Masanori Tawada | 1992-08-18 |
| 5131506 | Door control system using drive motor torque signals | Masamoto Mizuno, Masanori Tawada, Terumi Hirabayashi | 1992-07-21 |