Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11161787 | High-purity calcium carbonate sintered body and production method thereof, and high-purity calcium carbonate porous sintered body and production method thereof | Masahiko Tajika, Hidero Unuma, Jun Ito | 2021-11-02 |
| 11097987 | Production method of calcium carbonate porous sintered body | Masahiko Tajika, Shunzo Shimai | 2021-08-24 |
| 10328370 | Non-woven filtration material and air cleaner element | Shinsuke Mizuta | 2019-06-25 |