Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846309 | Elevator hoisting apparatus | Tastuhiko Takahashi, Masakatsu Tanaka, Yusho Maue, Naoyuki Tanaka, Masaaki Isono +1 more | 1989-07-11 |
| 4830146 | Fluid-pressure elevator | Ichiro Nakamura | 1989-05-16 |