Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4990625 | Process for synthesis of N,N-disubstituted hydrazone | Minoru Mabuchi, Shoji Umehara, Kiyoshi Sakai | 1991-02-05 |
| 4501808 | Recording medium and process employing a photosensitive organic film | Kiyoshi Sakai, Shozo Ishikawa, Minoru Mabuchi, Shoji Umehara | 1985-02-26 |