Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696034 | Method for producing hydrophobic silica fine powder | Yasuaki Nozawa, Kiyoshi Shirasuna, Keiji Shibata, Susumu Ueno | 2004-02-24 |
| 5855860 | Method for porifying fine particulate silica | Masanobu Nishimine, Yoshio Tomizawa, Kiyoshi Shirasuna, Susumu Ueno | 1999-01-05 |