Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5512198 | Lubricating compositions comprising fluoroalkane refrigerant, an ester and/or polyglycol oil, and an inorganic boron compound | Umekichi Sasaki, Hiroshi Hasegawa | 1996-04-30 |
| 5447647 | Synthetic lubricating oil | Noboru Ishida, Umekichi Sasaki, Tatsuyuki Ishikawa, Hiroshi Hasegawa | 1995-09-05 |
| 5443745 | Lubricant for refrigerating machine | Tetsuro Sakamoto, Hiroshi Hasegawa | 1995-08-22 |
| 5080816 | Lubricant for refrigerating machine | Tetsuro Sakamoto, Hiroshi Hasegawa | 1992-01-14 |