Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869928 | Inner surface coating method and device for piping | Harumichi Kurumatani, Takashi Nakao, Kazunori Nakano | 1989-09-26 |
| 4866157 | Thermosetting aromatic resin composition | Sugio Otani, Michiya Ota | 1989-09-12 |