Patent Leaderboard
USPTO Patent Rankings
Data through Sept 30, 2025
Search
Companies
Inventors
Cities
States
All Time
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
Home
›
Companies
›
Daicel
DA
Daicel
— 38 Patents in 2018
Rank
(2018):
#995
of
30,013
Top 4%
94
inventors
38
Patents 2018
Top Inventors at Daicel
2018
Showing
1–50
of
94
inventors
Rank
Name
Patents
1
Masayuki Yamazaki
3
1
Teppei Hanano
3
3
Haruhiko Yamashita
2
3
Hiroki Takenaka
2
3
Katsuhiro Nakaguchi
2
3
Kiyoshi Ikura
2
3
Mami Itoh
2
3
Naohiro Hashikawa
2
3
Ryohei Yamada
2
3
Takahiro HIRAMURA
2
3
Takashi Kubo
2
3
Takao Kuroda
2
3
Takaya Masumoto
2
3
Takashi Saeki
2
3
Toshihiro Izuma
2
3
Tomoharu Kobayashi
2
3
Tomohito Okabayashi
2
3
Yuichi Sakanishi
2
#19
Akihiro Wakatsuki
1
#19
Anan SAKAGUCHI
1
#19
Arimichi Okumura
1
#19
Atsushi Mimura
1
#19
Aya Yokoyama
1
#19
Dai Shiota
1
#19
Daisuke Tanida
1
#19
Geng Li
1
#19
Hiroki Chisaka
1
#19
Hisayoshi Ito
1
#19
Hiroshi Koyama
1
#19
Hiroyuki Miura
1
#19
Hiroto Miyake
1
#19
Hiroshi Takahashi
1
#19
Hiroki Tanaka
1
#19
Hiroaki Ushida
1
#19
Ichiro Takase
1
#19
Jun Shen
1
#19
Katsuhiro Imoto
1
#19
Katsuhiro NAKAHASHI
1
#19
Kazuki Okamoto
1
#19
Kenji Fukumoto
1
#19
Keiichi Osano
1
#19
Kenichiro Tomoi
1
#19
Kiyoharu Tsutsumi
1
#19
Kouichi UMEMOTO
1
#19
Kunihiro Noda
1
#19
Kyohei Ishida
1
#19
Kyuhei Kitao
1
#19
Masanori Futai
1
#19
Masaki Hayashi
1
#19
Masato Kurihara
1
1
2
Next »
Related Companies
Iii Holdings 12
38
Hartford Fire Insurance
38
Gyrus Acmi
38
Giesecke+Devrient Currency Technology Gmbh
38
Enplas
38
Cummins Emission Solutions
38
Cox Communications
38
Avery Dennison
38
Asahi Kasei Kabushiki Kaisha
38