Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883947 | Resistance ceramic heater with mutually connected heat-generating conductors, and electrochemical element or oxygen analyzer using such ceramic heater | Takao Murase | 1989-11-28 |
| 4824549 | Exhaust gas sensor for determining A/F ratio | Yasuhiko Hamada | 1989-04-25 |