Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5280263 | PTC device | — | 1994-01-18 |
| 5190697 | Process of making a PTC composition by grafting method using two different crystalline polymers and carbon particles | Kumakazu Ohkita, Akira Ueno, Toshiaki Abe | 1993-03-02 |