Patent Leaderboard
USPTO Patent Rankings
Data through Dec 31, 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
›
Ishikawa Gasket Co.
IC
Ishikawa Gasket Co.
— 229 Patents
Rank
(All Time):
#3,365
of
106,120
Top 4%
48
inventors
229
Patents All Time
Top Inventors at Ishikawa Gasket Co.
All Time
Showing
1–48
of
48
inventors
Rank
Name
Patents
1
Tsunekazu Udagawa
98
2
Yoshio Miyaoh
43
3
Susumu Inamura
31
#4
Yoshio Yamada
17
#5
Kisho Yasuda
13
#5
Toshihiro Imai
13
#7
Itsuo Ishikawa
7
#8
Kishou Yasuda
6
#8
Yuuichi Kinoshita
6
#8
Yuichi Kinoshita
6
#11
Tadashi Kasuya
5
#11
Tatsuro Uchida
5
#13
Hidetaka Nakasone
4
#13
Hisashi Yasui
4
#13
Takashi Okano
4
#16
Katsuji Aoki
3
#16
Kenji Yamada
3
#16
Masakazu Sueda
3
#16
Noriaki Akimoto
3
#16
Shinichi Sato
3
#16
Yutaka Kato
3
#22
Hironobu Nakamura
2
#22
Minoru Nakaya
2
#22
Takashi Inoue
2
#22
Takanobu Yokoyama
2
#22
Yutaka Munekata
2
#27
Akira Yoshihara
1
#27
Dai Fukai
1
#27
Fred K. Carr
1
#27
Hiroki Imada
1
#27
Kazuhiko Adachi
1
#27
Kazuyoshi Fujisawa
1
#27
Katsushiro Ishikawa, deceased
1
#27
Kazuya Yoshijima
1
#27
Kenichi Goshokubo
1
#27
Keisuke Nishimura
1
#27
Kunitoshi Kajiwara
1
#27
Masanori Sakamoto
1
#27
Masayuki Yano
1
#27
Mitsuru Ishii
1
#27
Mizuhiro Toki
1
#27
Soichi Isogai
1
#27
Susunu Inamura
1
#27
Suguru Onuki
1
#27
Tatsuo Shimakawa
1
#27
Yasuji Hiramatsu
1
#27
Yoshinori Kodera
1
#27
Yuichi Kionoshita
1
Related Companies
Mitsubishi Cable Industries
229
Cognis Ip Management Gmbh
229
Marconi Communications Gmbh
229
Ina Wälzlager Schaeffler Ohg
229
Synthelabo
229
Futaba
229
Surmodics
229
Esco Group
229
Joseph Voegele Ag
229