Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4421324 | Shaft seal device for submersible motor | Sakuei Yamamoto, Hiroshi Inao, Kiyonori Tokumitsu, Mitsuhiro Nishida | 1983-12-20 |
SK
Sadahiro Kumamoto
Overall (All Time): #4,062,410 of 4,157,543Top 100%
1
Patents All Time