Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869944 | Cordierite honeycomb-structural body and a method for producing the same | Takashi Harada, Toshiyuki Hamanaka, Seiichi Asami | 1989-09-26 |
| 4849275 | Cordierite honeycomb structural bodies | Toshiyuki Hamanaka, Takashi Harada, Seiichi Asami | 1989-07-18 |