Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886767 | Silicon nitride-ceramic and a manufacturing method therof | Takeyuki Yonezawa, Yoshiyuki Ohnuma | 1989-12-12 |
| 4838368 | Manual combinatorial weighing apparatus | Hirokazu Sato, Kazufumi Horiuchi, Yasuo Michibayashi, Hideo Nobutsugu, Takumi Kawamura | 1989-06-13 |