Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823863 | Thermal conduction device | Tadakatsu Nakajima, Shigeo Oohashi, Heikichi Kuwabara, Takahiro Daikoku | 1989-04-25 |
| 4794775 | Method of producing a heat transfer tube for single-phase flow | Heikichi Kuwahara, Kenji Takahashi, Takehiko Yanagida, Shigeo Sugimoto, Kiyoshi Oizumi | 1989-01-03 |