Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8012443 | Spherical calcium carbonate and method of producing the same | Kazuo Yamashita | 2011-09-06 |
| 7754176 | Spherical calcium carbonate and method for producing thereof | Kazuo Yamashita | 2010-07-13 |