Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818731 | Colored frit and method for manufacturing of artificial stone | Masao Yoshizawa, Toichiro Izawa | 1989-04-04 |
| 4767725 | Crystallized glass-ceramic molded product and method of manufacturing | Masao Yoshizawa, Toichiro Izawa | 1988-08-30 |