Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879159 | Decorative foamed glass with dense glass surface layer and method of producing same | — | 1989-11-07 |
| 4833015 | Multilayer foam glass with dense glass surface layer and method of producing same | Makoto Nagano, Yoshiaki Tsuji | 1989-05-23 |