Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6381882 | Work control system for a trencher type excavator for soil cement wall | Motohiko Mizutani, Tadao Nakayama, Shozo Kajikawa | 2002-05-07 |
| 4656533 | Floppy disc drive unit | Junichi Sakai, Seiichi Watanabe | 1987-04-07 |