Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7387746 | Method of producing a refrigeration lubricant | Munehiro Yamada, Nobuhiko Shizuka, Hiroko Miyashita | 2008-06-17 |
| 6939980 | Process for producing ester | Keiji Hirao | 2005-09-06 |
| 6617289 | Method for producing ester | Keiji Hirao | 2003-09-09 |