Issued Patents All Time
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4680374 | Optical disc substrate made of a copolycarbonate | Masayoshi Hasuo, Seiichi Mukai, Hiroshi Urabe, Masahiro Nukui | 1987-07-14 |
SY
Seiji Yoshida
NTT: 10 patents #481 of 4,871Top 10%
Panasonic: 3 patents #7,617 of 21,108Top 40%
Japan Aerospace Exploration Agency: 2 patents #70 of 546Top 15%
Mitsubishi Chemical: 2 patents #163 of 716Top 25%
Overall (All Time): #149,608 of 4,157,543Top 4%
26
Patents All Time