Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4594169 | Drilling fluid additives | Yoshizi Saito, Masaru Nakamura, Toyoshi Iida | 1986-06-10 |
| 4472369 | Process for producing ferrites | Koichi Kambe, Toshio Toyota, Mitsuharu Tominaga, Koichi Yoshioka | 1984-09-18 |