Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226969 | Method for cleaning solid surface with a mixture of pure water and calcium carbonate particles | Masahiro Watanabe, Megumi Hamano, Yoshiharu Takizawa | 1993-07-13 |
| 5203798 | Cleaning apparatus for substrate | Masahiro Watanabe, Megumi Hamano | 1993-04-20 |