Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808896 | Control device for heating deep-sea electric motor oil | Yoshio Katsuragi | 1989-02-28 |
HO
Hatsuo Ohta
Overall (1989): #107,991 of 140,708Top 80%
1
Patents 1989