Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887404 | Translucent glass brick made of opal glass with light diffusible crystal particles | Kosaburo Saji, Shigeru Yamamoto | 1989-12-19 |
| 4872779 | Joint device of structure member | — | 1989-10-10 |