Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8252413 | Light calcium carbonate, process for producing the same, and printing paper containing the same | Kazuhisa Shimono, Tatsuo Takano | 2012-08-28 |
| 8017101 | Precipitated calcium carbonate, method for producing the same and filler for loading paper using the same | Kazuo Yamashita, Kazuhisa Shimono, Tatsuo Takano | 2011-09-13 |