Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874436 | Method for producing high purity electrolytic copper | Masanori Kato, Yoshio Kawasumi, Chikara Tominaga, Kanji Tanaka | 1989-10-17 |
| 4845055 | Rapid annealing under high pressure for use in fabrication of semiconductor device | — | 1989-07-04 |