Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7380416 | Conduit for molten glass, connecting conduit for molten glass and vacuum degassing apparatus | Naruaki Tomita, Kazuo Hamashima, Koji Obayashi | 2008-06-03 |
| 7377132 | Conduit for molten glass, molten glass degassing method and molten glass degassing apparatus | Kazuo Hamashima, Hajime Ito | 2008-05-27 |