Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571660 | Lightning arrester insulator | Yoshio Mitsumatsu, Akio Kamio, Masayuki Nozaki | 1986-02-18 |
| 4465900 | High voltage glazed porcelain insulators | Yoshio Mitsumatsu | 1984-08-14 |
| 4232185 | Electrical insulator with semiconductive glaze | Noboru Higuchi, Takayuki Ogasawara | 1980-11-04 |