Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11396451 | Tungsten carbide powder and production method therefor | Masato Michiuchi, Takamasa ONOKI, Katsumi Okamura, Takehiko Hayashi | 2022-07-26 |
| 11339096 | Tungsten carbide powder | Masato Michiuchi, Takamasa ONOKI, Katsumi Okamura, Takehiko Hayashi | 2022-05-24 |
| 11293082 | Powder containing tungsten carbide | Kazuo Sasaya, Takehiko Hayashi | 2022-04-05 |
| 9512504 | Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution | Yoshiharu Yamamoto, Kazuo Sasaya, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi +2 more | 2016-12-06 |
| 9249479 | Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution | Yoshiharu Yamamoto, Kazuo Sasaya, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi +2 more | 2016-02-02 |
| 8632747 | Method for producing sodium tungstate, method for collecting tungsten, apparatus for producing sodium tungstate, and method for producing sodium tungstate aqueous solution | Yoshiharu Yamamoto, Kazuo Sasaya, Akira Nakano, Syunsuke Yamanaka, Takahisa Iguchi +2 more | 2014-01-21 |