Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4988505 | Deodorizer | Yoshitane Watanabe, Keitaro Suzuki, Mutsuko Suzuki | 1991-01-29 |
| 4904304 | Chemical grout for ground injection and method for accretion | Yoshitane Watanabe, Mikio Ando | 1990-02-27 |