Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4340577 | Process for producing carbon black | Kohichi Sugawara, Naoki Ishimaru, Teruhiro Ikegami | 1982-07-20 |
| 4339090 | Cop supplying method for automatic winding machine | Buro Suganuma | 1982-07-13 |