Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5866239 | Top plate having a first enamel coating in a heating portion and a second enamel coating in a non-heating portion on a surface of a low expansion crystallized glass | Narutoshi Shimatani, Akihiko Sakamoto | 1999-02-02 |
| 5776613 | Enamel frit composition for a low-expansion crystallized glass and enamel-coated low-expansion crystallized glass plate using the same | Narutoshi Shimatani, Akihiko Sakamoto | 1998-07-07 |
| 5691254 | Enamel frit composition for a low-expansion crystallized glass and enamel-coated low-expansion crystallized glass plate using the same | Akihiko Sakamoto, Masayuki Ninomiya | 1997-11-25 |
| 5230954 | Fire-protection and safety composite glass panel | Akihiko Sakamoto, Takehiro Shibuya | 1993-07-27 |