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
Cities
States
Mitaka, JP
All Time
2,833 patents · 611 inventors
Ranked
#1,642
of 111,555 cities
Top 2%
Showing 1–50 of 611 inventors
Rank
Inventor
Primary Company
Patents
1
Kazumasa Ikushima
Musashi Engineering
115
2
Hiroyuki Shinada
Hitachi
79
3
Kazuhiko Takada
Yazaki
68
#4
Takeshi Honjo
Canon
45
#5
Jumpei Tajima
Kabushiki Kaisha Toshiba
43
#6
Noboru Ueda
Konica Minolta
42
#7
Koichiro Yoshino
Olympus
41
#8
Hideo Ishikawa
Daido Metal Company
39
#9
Masafumi Oikawa
Nikon
38
#10
Tsuneo Uwabo
Mitsumi Electric Co.
34
#11
Tatsuya Takagi
Konica Minolta
31
#11
Hajime Kobayashi
Sony
31
#13
Masakazu Kanatani
Sony
30
#13
Maki Yonetsu
Kabushiki Kaisha Toshiba
30
#15
Kohei Momosaki
Kabushiki Kaisha Toshiba
29
#15
Yoshihiko Takeuchi
Yamaha Motor
29
#17
Norihiro Tomimatsu
Kabushiki Kaisha Toshiba
27
#17
Akitoshi Oikawa
Sega Enterprises
27
#17
Masao Wada
Casio Computer Co.
27
#20
Toshiya Yuasa
Canon
25
#21
Keito Fukushima
Olympus
24
#22
Naohiro Kageyama
Minolta
23
#22
Yoshihisa Koyama
Victor Company Of Japan
23
#22
Minoru Numoto
Tokyo Seimitsu Co.
23
#25
Fumitaka Mochizuki
Konica
21
#25
Masaru Murashita
Hitachi Aloka Medical
21
#27
Shuji Shibuki
Casio Keisanki
20
#28
Tomoya Makino
Toyota
19
#29
Setsuo Soga
Ricoh Company
18
#29
Seiichiro Hirata
Mitsubishi Electric
18
#31
Hiroshi Ooi
Sharp Kabushiki Kaisha
16
#31
Tomohiro Sanpei
Toshiba Lighting & Technology
16
#31
Ryoichi Sakai
Hitachi Aloka Medical
16
#31
Takuya Yamamura
Mitsubishi Motors
16
#31
Motohiro Gotanda
—
16
#36
Masaji Ozaki
Jamco
15
#37
Soichiro KOSHIKA
Olympus
14
#37
Yuriko Igarashi
Kureha Kagaku Kogyo
14
#37
Shuichiro Kaneko
Konica Minolta
14
#37
Yutaka Horie
Kabushiki Kaisha Toshiba
14
#37
Hiromi Yatsuda
Japan Radio Co.
14
#42
Yutaka Masaki
Olympus
13
#42
Katsuo Honda
Tokyo Seimitsu Co.
13
#42
Seisuke Yamanaka
Sony
13
#42
Teruo Iwasawa
Olympus Optical Co.
13
#42
Shigeru Motoki
Toshiba Lighting & Technology
13
#42
Naoki Ohtomo
Aloka Co.
13
#42
Tomoaki Chono
Hitachi Medical
13
#49
Yosuke Mizutani
Honda Motor Co.
12
#49
Masaki Katsura
Toshiba
12
1
2
3
Next »