Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5938910 | Electrolytic manganese dioxide and method of manufacturing the same | Yoshihiro Nakayama, Ryoichi Shimizugawa, Tsutomu Kishikawa, Takumi Murai, Fumiya Takahashi +1 more | 1999-08-17 |
| 5749935 | Manganese fertilizer | Ryoichi Shimizugawa, Toshihiko Tokai | 1998-05-12 |
| 5746902 | Electrolytic manganese dioxide and method of manufacturing the same | Yoshihiro Nakayama, Ryoichi Shimizugawa, Tsutomu Kishikawa, Takumi Murai, Fumiya Takahashi +1 more | 1998-05-05 |
| 4405419 | Method for producing electrolytic manganese dioxide | Masatoshi Misawa, Kusuhiko Takahashi, Kinnosuke Okuda, Kiyoshi Matsuura, Keiichiro Ishikawa | 1983-09-20 |