Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8415283 | Lubricating oil composition for diesel engine | Isao Kurihara | 2013-04-09 |
| 6627583 | Engine oil composition | Kiyoshi Inoue, Jinichi Igarashi, Mituaki Ishimaru, Masakuni Hirata | 2003-09-30 |
| 5663125 | Lubricating oil for two-cycle engines | Mitsuaki Ishimaru, Noboru Ishida | 1997-09-02 |
| 5624890 | Lubricating oil composition for use in two-stroke cycle cylinder injection engine | Kazuo Miyazawa | 1997-04-29 |
| 5543081 | Lubricant additive | Noboru Ishida, Mitsuaki Ishimaru | 1996-08-06 |
| 5411672 | Lubrication oil composition | Mitsuaki Ishimaru, Hiroaki Ishii | 1995-05-02 |
| 4994196 | Two-cycle engine oil composition | Mitsuaki Ishimaru | 1991-02-19 |
| 4299714 | Hydrocarbon based central system fluid composition | Kensuke Sugiura, Hiroyuki Aoki, Takeitiro Takehara | 1981-11-10 |