Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870834 | Vapor pressure-adjusting valve and refrigeration system using same | Shinji Ogawa, Yoshiharu Kajikawa, Isao Kuroyanagi, Norimasa Baba | 1989-10-03 |
| 4830101 | Aluminum heat exchanger and method for producing aluminum heat exchanger | Toshio Takahashi, Masayoshi Nishikawa, Tutomu Niwa, Takao Ogino, Ryosuke Sako +1 more | 1989-05-16 |