Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837058 | Liquid crystal cell | Masanobu Aizawa, Yuzo Hisatake | 1989-06-06 |
| 4834051 | Oxygen sensor and an air-fuel ratio control apparatus of an internal combustion engine using the same | Masahi Tanaka, Masaru Mikita | 1989-05-30 |