Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10182689 | Squeegee device for cleaning | Takeo Yamazaki | 2019-01-22 |
| 5791862 | Suspension support device for an outer wall working machine | Shigeru Ohtsuki, Mitsuru Kawahara, Huang Jun | 1998-08-11 |
| D393133 | Roof car for suspending a working cage | Shigeru Ohtsuki | 1998-03-31 |