Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808395 | High-quality coloring carbon black and process for its production | Shushichi Yoshimura, Makoto Ishizu, Hiromu Kobayashi | 1989-02-28 |
| 4693879 | Ultrasonic vibration sieving apparatus and process for purifying carbon black by using the apparatus | Shushichi Yoshimura, Yasunori Hiwatashi, Hiromu Kobayashi, Nobu Nishino, Teruji Tahara +1 more | 1987-09-15 |
| 4631180 | Process for producing carbon black | Syushichi Yoshimura, Hiromu Kobayashi, Yoshikazu Toyonaga, Masanori Karatsu | 1986-12-23 |