Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887404 | Translucent glass brick made of opal glass with light diffusible crystal particles | Shigeru Yamamoto, Katsuhiko Imai | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887404 | Translucent glass brick made of opal glass with light diffusible crystal particles | Shigeru Yamamoto, Katsuhiko Imai | 1989-12-19 |