Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8997526 | Vacuum degassing apparatus and vacuum degassing method for molten glass | Toru Nishikawa, Tetsuya Koyama, Yuji Endo, Hajime Itoh | 2015-04-07 |
| 8720229 | Vacuum degassing apparatus, apparatus for producing glass products and process for producing glass products | Rei Kitamura, Hiroaki Hamamoto, Hajime Itoh, Housaku Yonetsu | 2014-05-13 |
| 8468851 | Vacuum degassing apparatus and vacuum degassing method for molten glass | Toru Nishikawa, Tetsuya Koyama, Yuji Endo, Hajime Itoh | 2013-06-25 |
| 8347654 | Vacuum degassing apparatus and vacuum degassing method for molten glass | Toru Nishikawa, Tetsuya Koyama, Yuji Endo, Hajime Itoh | 2013-01-08 |