Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4324629 | Process for regenerating chemical copper plating solution | Hitoshi Oka, Hiroshi Kikuchi, Hitoshi Yokono, Haruo Suzuki, Toyofusa Yoshimura +3 more | 1982-04-13 |
| 4310563 | Method for automatically controlling composition of chemical copper plating solution | Hitoshi Oka, Kenji Nakamura, Hitoshi Yokono, Tokio Isogai, Akira Matsuo +1 more | 1982-01-12 |