Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875712 | Joint structure for a tube support plate and a tube | Noriyuki Oda, Tetsuo Takehara, Katsumi Higashi | 1989-10-24 |
| 4838581 | Joint structure for a tube support plate and a tube | Noriyuki Oda, Tetsuo Takehara, Katsumi Higashi | 1989-06-13 |