Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4452635 | Hydraulic cement composition | Hiroyuki Naito, Kiyoshi Takai, Masaaki Sugawara | 1984-06-05 |
| 4188268 | Process for an electrode for a lead battery | Yujiro Sugahara, Hiroyuki Naito, Akira Takahashi, Masanori Ito, Hisashi Tuchida | 1980-02-12 |