Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806889 | Ceramic filter | Fumihito Nakano, Kenji Endo, Kohei Wada, Katsuya Jindou | 1989-02-21 |
KH
Kiyoshi Hagawa
Overall (1989): #139,698 of 140,708Top 100%
1
Patents 1989