Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4209592 | Sulphonation method for manufacture of a cation exchange resin | Hiroshi Akiyama, Hiroshi Kuyama | 1980-06-24 |
KO
Kohji Oinuma
Overall (All Time): #4,114,573 of 4,157,543Top 100%
1
Patents All Time