Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853198 | Process for producing unsintered cristobalite silica | Koichi Orii, Iwao Ohshima | 1989-08-01 |
NW
Naotake Watanabe
Nitto Chemical Industry Co.: 1 patents #2 of 28Top 8%
Overall (1989): #73,832 of 140,708Top 55%
1
Patents 1989