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

Kazuhiko Ishii — 39 Patents

UNUnknown: 22 patents #172 of 83,584Top 1%
NDNtt Docomo: 19 patents #155 of 1,706Top 10%
NKNippon Kayaku: 7 patents #76 of 1,103Top 7%
Hitachi: 4 patents #8,942 of 28,497Top 35%
MEMitsubishi Engineering-Plastics: 4 patents #21 of 163Top 15%
TITakeda Chemical Industries: 2 patents #497 of 1,420Top 35%
TTThe University Of Tokyo: 2 patents #500 of 2,633Top 20%
MCMitsubishi Gas Chemical Company: 2 patents #789 of 1,727Top 50%
NDNit Docomo: 1 patents #1 of 27Top 4%
NCNippon Paint Holdings Co.: 1 patents #415 of 834Top 50%
Suita, JP: #19 of 1,253 inventorsTop 2%
Overall (All Time): #83,367 of 4,157,543Top 3%
39 Patents All Time

Issued Patents All Time

Showing 26–39 of 39 patents

Patent #TitleCo-InventorsDate
6342550 Flame-retardent polycarbonate resin composition and a molded product using the same Ken Shimomai 2002-01-29
6294239 Ultraviolet-curable adhesive composition Kiyohisa Tokuda 2001-09-25
6284185 Ultraviolet-curable adhesive composition for bonding opaque substrates Kiyohisa Tokuda 2001-09-04
6254958 Photosensitive resin composition and articles Kenji Yoshida, Kiyohisa Tokuda 2001-07-03
6017603 Ultraviolet-curing adhesive composition and article Kiyohisa Tokuda, Kenji Yoshida, Minoru Yokoshima 2000-01-25
5658984 Permanent anti-static polycarbonate resin composition Goro Shimaoka, Michio Nakata 1997-08-19
5534557 Onium salt, photopolymerization initiator, energy ray-curing composition containing the initiator, and cured product Tetsuya Abe, Minoru Yokoshima 1996-07-09
5502083 Onium salt, photopolymerization initiator, energy ray-curing composition containing the initiator, and cured product Tetsuya Abe, Minoru Yokoshima 1996-03-26
5412400 Process monitoring system and a window displaying method therefor Kazuko Takahara, Hideyuki Sato 1995-05-02
5298559 Multi-layered polymers Tatsuo Fujii, Shinji Tachibana, Junji Oshima, Goro Shimaoka, Makoto Mizutani 1994-03-29
5288801 Polycarbonate resin composition Makoto Mizutani 1994-02-22
5206299 Core-shell polymer, resin composition and molded articles thereof Junji Oshima, Takao Teraoka, Minoru Yamada, Shizuo Togo, Goro Shimaoka 1993-04-27
4583224 Fault tolerable redundancy control Atomi Noguchi, Yoshimi Gotoh 1986-04-15
4246118 Apparatus for separating solid and liquid Masahisa Tada, Masahiko Kato, Tsuneo Ukita, Hiroshi Segawa, Masao Domoto +4 more 1981-01-20