Patent Leaderboard
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
Search
Companies
Inventors
PI
Pigeon
Rank (All Time):
#10839
of 106,127
Top 15%
54 inventors
62
Patents All Time
Top Inventors at Pigeon
All Time
Rank
Name
Patents
1
Mitsuo Tashiro
12
2
Daisuke Yamashita
11
3
Hiroyuki Uehara
8
#4
Yukifumi Ochiai
7
#5
Satoru Saito
6
#6
Shinichi Kataoka
5
#7
Yoichi Nakata
5
#8
Ryotaro Sato
4
#9
Hidekazu Okuno
3
#10
Koji Matsutori
3
#11
Masayuki Nakahara
3
#12
Michiyo Kajinaga
3
#13
Norio Kimura
3
#14
Satoshi Koyama
3
#15
Sumiko Kuroishi
3
#16
Yusuke Kawano
3
#17
Zenichi Onuki
3
#18
Aki Ishimaru
3
#19
Chikako Mori
2
#20
Hikaru Ishikawa
2
#21
Hitoshi Takagi
2
#22
Katsutoshi Takahashi
2
#23
Masatomo Ohara
2
#24
Masakazu Yoshida
2
#25
Shigeru Aida
2
#26
Tatsuyuki Ishikawa
2
#27
Takashi Sano
2
#28
Xiangling (Steve) Chen
2
#29
Yoshiyuki Oushi
2
#30
Yoshihito Sugiyama
2
#31
Yuichiro Tanaka
2
#32
Zenichi Ohnuki
2
#33
Hideki Iwayama
1
#34
Hiroshi Kawamura
1
#35
Hiroshi Kobayashi
1
#36
Ikuko Mikami
1
#37
Kazumasa Ito
1
#38
Katsumi MIZUNO
1
#39
Katsushi Tsutsui
1
#40
Keisuke Arai
1
#41
Masahiko Fujishiro
1
#42
Makiko Kida
1
#43
Megumi Fujiwara
1
#44
Mitsuo Iida
1
#45
Naoko Hirata
1
#46
Nobuyasu Endo
1
#47
Shuko Yumino
1
#48
Tamotsu Matsumoto
1
#49
Youji Ishimaru
1
#50
Yukinari Awano
1
#51
Yuko Kusafuka
1
#52
Akiko Munezawa
1
#53
Emi Kuramoto
1
#54
Zenichi Oknuki
1