Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860565 | Process for preparing hollow aluminum extrudates for use in vacuum | Yutaka Kato | 1989-08-29 |
| 4828937 | Process for producing hollow extrudate for use in vacuum | Yutaka Kato, Kenji Tsukamoto | 1989-05-09 |