Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876164 | Process for manufacturing a photomask | Tatsuo Okamoto, Shuichi Matsuda | 1989-10-24 |
| 4873163 | Photomask material | Hiroaki Morimoto, Tatsuo Okamoto | 1989-10-10 |
YW
Yaichiro Watakabe
Overall (1989): #12,608 of 140,708Top 9%
2
Patents 1989