Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7591709 | Blasting device | Tokuo Shimizu | 2009-09-22 |
| 7543769 | Blasting medium picking-apart device | Tokuo Shimizu, Naoki Okamoto | 2009-06-09 |
| 7465215 | Sponge blasting apparatus and sponge blasting method | Tokuo Shimizu, Atsushi Maeda, Takashi Kitahara | 2008-12-16 |
| 7416471 | Recovery device of blasting medium and method therefor | Tokuo Shimizu, Naoki Okamoto | 2008-08-26 |
| 7331846 | Blasting apparatus for outer surface of pipe | Tokuo Shimizu | 2008-02-19 |
| 7182671 | Blasting apparatus and blasting method | Tokuo Shimizu | 2007-02-27 |