Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849382 | Lightweight refractory and process for producing the same | Kenichi Shibata, Kouichi Kimura, Tomohiko Hara | 1989-07-18 |
TT
Tatsuo Takagi
Overall (1989): #52,254 of 140,708Top 40%
1
Patents 1989