Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797107 | Copyable blackboard | Naoyuki Hatta, Hideo Yoshihara, Takeshi Izaki, Takemi Yamamoto, Kazuo Sangyoji | 1989-01-10 |
AS
Akihiro Sawada
Overall (1989): #134,420 of 140,708Top 100%
1
Patents 1989