Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4431478 | Etching agent for polyimide type resins and process for etching polyimide type resins with the same | Shigenori Yamaoka, Kenmatsu Isozaki, Kyotaro Nishi, Yukihiro Okabe, Mitsutaka Waki | 1984-02-14 |
| 4401499 | Crosslinked resin of epoxy compound and isocyanate and process for producing same | Shoroku Kaneko, Sigenori Yamaoka, Yukihiro Okabe | 1983-08-30 |