Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846938 | Method of manufacturing a porous electroformed object | Osamu Ishigami, Akira Ichikawa, Daijyu Yoshino, Akira Soyama | 1989-07-11 |
| 4841618 | Method of manufacturing an electrocast shell having permeability | Tamio Furuya, Toshiyuki Kinugasa, Yoshiki Ishige, Yuichi Tsuchimoto | 1989-06-27 |