Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834052 | Internal combustion engine having air/fuel mixture with anti-reducing semiconducting porcelain having a positive temperature coefficient of resistance and method for using such porcelain for heating air/fuel mixture | Hitoshi Niwa, Hirokatsu Mukai, Toshiatsu Nagaya, Naoto Miwa, Itsuhei Ogata | 1989-05-30 |
| 4831432 | Positive ceramic semiconductor device | Itsuhei Ogata, Hitoshi Niwa, Naoto Miwa | 1989-05-16 |