Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809415 | Method of manufacturing a heat exchange pipe | Yukihiro Okayama, Akio Yoshioka | 1989-03-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809415 | Method of manufacturing a heat exchange pipe | Yukihiro Okayama, Akio Yoshioka | 1989-03-07 |