Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4817761 | Control apparatus for elevator | Shigemi Iwata | 1989-04-04 |
| 4815567 | Apparatus for controlling an A.C. powered elevator | — | 1989-03-28 |
HI
Hiroyuki Ikejima
Overall (1989): #25,976 of 140,708Top 20%
2
Patents 1989