Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880054 | Heat exchanger tube for evaporation or condensation | Masao Fujii, Kiyoshi Sakuma | 1989-11-14 |
| 4869316 | Heat exchanger | Kiyoshi Sakuma, Yu Seshimo, Masao Hujii | 1989-09-26 |
| 4854380 | Heat exchanger | Kiyoshi Sakuma, Yu Seshimo, Masao Hujii | 1989-08-08 |
| 4794983 | Heat exchanger tube for evaporation or condensation | Masao Fujii, Kiyoshi Sakuma | 1989-01-03 |