Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882497 | Method and apparatus of measuring outer diameter and structure of optical fiber | Yasuji Hattori | 1989-11-21 |
| 4861746 | Catalyst for hydrotreating heavy hydrocarbon oils and a method of preparing the catalyst | Yasuyuki Oishi | 1989-08-29 |
| 4854123 | Method for removal of nitrogen oxides from exhaust gas of diesel engine | Motonobu Kobayashi, Futoru Kinoshita, Kiichiro Mitsui | 1989-08-08 |
| 4853885 | Method of compressing character or pictorial image data using curve approximation | Satoshi Naoi, Katsuhiko Nishikawa, Shigemi Nagata | 1989-08-01 |
| 4840749 | Process for production of 1-aminoanthraquinone | Noriaki Ikeda, Noboru Sugishima, Yasushi Fujii, Shinji Ikuta, Yoshiyuki Nakanishi | 1989-06-20 |
| 4836914 | Method for removing iron content in petroleum series mineral oil therefrom | Masaru Ushio, Toru Morita, Yasuyuki Oishi, Hisao Sakoda | 1989-06-06 |
| 4825365 | Multi-imaging apparatus | — | 1989-04-25 |
| 4814153 | Method of cleaning exhaust gases | Motonobu Kobayashi, Mitsuharu Hagi, Tsuyoshi Nagai, Hutoru Kinoshita | 1989-03-21 |