Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942905 | Composite hose construction | Masakazu Koizumi, Tadashi Ishibashi | 1990-07-24 |
| 4729746 | Buoy having excellent resistance against external pressure | — | 1988-03-08 |
ET
Eiji Takemae
Japan Drilling Co.: 1 patents #4 of 16Top 25%
Overall (All Time): #2,325,105 of 4,157,543Top 60%
2
Patents All Time