Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832867 | Lubricating oil composition | Hiromichi Seiki | 1989-05-23 |
| 4821526 | Air conditioning apparatus | Nobuo Otsuka, Peter Thompson | 1989-04-18 |
HI
Hideo Igarashi
Idemitsu Kosan Co.: 1 patents #13 of 55Top 25%
Overall (1989): #25,984 of 140,708Top 20%
2
Patents 1989