Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870659 | FSK demodulation circuit | Takeshi Takano, Takaharu Nakamura, Yukio Takeda, Yasunobu Watanabe | 1989-09-26 |
| 4861746 | Catalyst for hydrotreating heavy hydrocarbon oils and a method of preparing the catalyst | Akira Inoue | 1989-08-29 |
| 4836914 | Method for removing iron content in petroleum series mineral oil therefrom | Akira Inoue, Masaru Ushio, Toru Morita, Hisao Sakoda | 1989-06-06 |