Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870221 | Oil-filled capacitor | Shigenobu Kawakami, Keiji Endo, Hideyuki Dohi | 1989-09-26 |
| 4827065 | Method of producing p-isobutylstyrene and a starting compound therefor | Isoo Shimizu, Ryotaro Hirano, Yasuo Matsumura, Hideki Nomura, Kazumichi Uchida | 1989-05-02 |
| 4804729 | Electrical insulating material and power cable comprising a crosslinked layer thereof | Yuichi Orikasa, Shinji Kojima, Takashi Inoue, Shigenobu Kawakami, Kaoru Yamamoto | 1989-02-14 |
| 4803238 | Polymer composition | Keiji Endo, Shigenobu Kawakami, Eiichi Matsuzaka, Satoshi Narui | 1989-02-07 |
| 4802058 | Novel method for refining electrical insulating oil | Shigenobu Kawakami, Keiji Endo, Hideyuki Dohi | 1989-01-31 |