Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
EY

Eiichi Yamada

Sony: 20 patents #2,042 of 25,231Top 9%
INInpex: 13 patents #4 of 67Top 6%
CCCosmo Oil Co.: 13 patents #4 of 229Top 2%
JNJapan Oil, Gas And Metals National: 13 patents #4 of 106Top 4%
JCJapan Petroleum Exploration Co.: 13 patents #4 of 93Top 5%
JEJx Nippon Oil & Energy: 12 patents #14 of 416Top 4%
NCNippon Steel Engineering Co.: 10 patents #2 of 107Top 2%
NTNTT: 7 patents #771 of 4,871Top 20%
NENS Sumikin Engineering: 4 patents #6 of 113Top 6%
Hitachi: 3 patents #10,712 of 28,497Top 40%
NCNippon Oil & Fats Co.: 3 patents #69 of 409Top 20%
MOMolex: 2 patents #661 of 1,726Top 40%
FIFujimi Incorporated: 2 patents #88 of 216Top 45%
Toyota: 1 patents #15,335 of 26,838Top 60%
IRInstitute For Advanced Skin Research: 1 patents #5 of 13Top 40%
NONippon Oil: 1 patents #392 of 773Top 55%
RTRenesas Technology: 1 patents #1,991 of 3,337Top 60%
TCToyoda Gosei Co.: 1 patents #1,271 of 2,296Top 60%
Overall (All Time): #45,995 of 4,157,543Top 2%
55 Patents All Time

Issued Patents All Time

Showing 51–55 of 55 patents

Patent #TitleCo-InventorsDate
5759528 Topical composition for promoting transdermal absorption of therapeutic agents Shinji Hayashi, Masao Takahashi, Shoji Fukushima 1998-06-02
5748397 Audio signal processing apparatus and recording and/or reproducing apparatus for a tape-shaped recording medium 1998-05-05
4923905 Light curable dental composition Eiichi Masuhara, Yoshinori Kadoma, Takeo Matsumoto, Takeshi Komai, Osamu Nakachi +1 more 1990-05-08
4824876 Light curable dental liquid or paste Takeo Matsumoto, Osamu Nakachi, Godo Irukayama, Yoshihiro Minoshima 1989-04-25
4746685 Light curable dental composition Eiichi Masuhara, Yoshinori Kadoma, Takeo Matsumoto, Takeshi Komai, Osamu Nakachi +1 more 1988-05-24