Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886616 | Aluminum surface cleaning agent | Katsuyoshi Yamasoe, Kiyotado Yasuhara | 1989-12-12 |
| 4856857 | Transparent reflection-type | Satoshi Takeuchi, Koutaro Danjo, Shigehiko Tahara, Yoshiharu Yui | 1989-08-15 |
| 4851148 | Method of controlling an aluminum surface cleaning composition | Katsuyoshi Yamasoe, Kiyotada Yasuhara | 1989-07-25 |