Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840042 | Heat pump system | Mitsuhiro Ikoma, Kazuo Nakatani, Yuji Yoshida, Koji Arita | 1989-06-20 |
TT
Takeshi Tomizawa
Overall (1989): #52,148 of 140,708Top 40%
1
Patents 1989