Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4504403 | Refrigeration oil composition | Umekichi Sasaki | 1985-03-12 |
| 4267064 | Refrigeration lubricating oil compositions | Umekichi Sasaki, Kaichi Yamada, Yoshiyuki Morikawa | 1981-05-12 |