Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4673470 | Tin, lead, or tin-lead alloy plating bath | Keigo Obata, Yoshiaki Okuhama, Seishi Masaki, Yukiyoshi Okada, Masakazu Yoshimoto | 1987-06-16 |
| 4555314 | Tin-lead alloy plating bath | Keigo Obata, Yoshiaki Okuhama, Seishi Masaki, Yukiyoshi Okada, Tadashi Yoshida | 1985-11-26 |
| 4459185 | Tin, lead, and tin-lead alloy plating baths | Keigo Obata, Yoshiaki Okuhama, Seishi Masaki, Yukiyoshi Okada, Masakazu Yoshimoto | 1984-07-10 |