Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6978876 | Step for escalator | Yoshio Tsukahara, Takashi Tanaka, Koichi Maeda | 2005-12-27 |
| 6012554 | Elevator guide rail | Hideki Ito | 2000-01-11 |
| 4425128 | Air-permeable and waterproof diaper cover | — | 1984-01-10 |