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
Hamamatsu, JP
1997
420 patents · 276 inventors
Ranked
#113
of 24,315 cities
Top 1%
Showing 1–50 of 276 inventors
Rank
Inventor
Primary Company
Patents
1
Masahiko Katoh
Sanshin Industries
7
2
Yutaka Washiyama
Kawai Gakki Seisakusho
6
2
Jun Ishii
Nitto Denko
6
2
Kimihiro Nonaka
Sanshin Industries
6
#5
Musubu Koishi
Hamamatsu Photonics
5
#5
Tatsuyuki Ohashi
Honda Motor Co.
5
#5
Ryotaro Matui
Hamamatsu Photonics K.K.
5
#5
Katsuji Yoshimura
Canon
5
#5
Tomoyuki Ikedo
Hamamatsu Photonics K.K.
5
#10
Masayoshi Nanami
Yamaha Motor
4
#10
Kazuhisa Miyaguchi
Hamamatsu Photonics K.K.
4
#10
Kenji Seki
Osaka Gas Co.
4
#10
Shinichi Yamada
Sumitomo Wiring Systems
4
#10
Katsunori Suzuki
Hitachi
4
#10
Hiroyuki Kyushima
Hamamatsu Photonics K.K.
4
#10
Takeo Shibukawa
Yamaha
4
#17
Ryoichi Nakase
Sanshin Industries
3
#17
Kunimasa Muroi
Yamaha
3
#17
Naoki Uchiyama
Hamamatsu Photonics K.K.
3
#17
Satoshi Usa
Yamaha
3
#17
Takeo Sugawara
Hamamatsu Photonics K.K.
3
#17
Yoichiro Ogai
Yamaha
3
#17
Seiichiro Mizuno
Hamamatsu Photonics K.K.
3
#17
Itsushi Nagamoto
Yamaha
3
#17
Mitsuhiro Kurata
Yamaha
3
#17
Junichi Fujimori
Yamaha
3
#17
Shinji Hamanaga
Yamaha
3
#17
Haruki Uehara
Yamaha
3
#17
Toshiharu Fukushima
Yamaha
3
#17
Suguru Tabara
Yamaha
3
#31
Yasuhiko Oba
Yamaha
2
#31
Takashi Yumita
Ihara Chemical Industry Co.
2
#31
Tadao Izuta
Nippon Gakki Seizo
2
#31
Tomohiro Yuuki
Yamaha
2
#31
Tsutomu Imaizumi
Yamaha
2
#31
Akikazu Kojima
Nippon Soken
2
#31
Taro Kawabata
Yamaha
2
#31
Katsuya Ishikawa
Fujitsu Limited
2
#31
Yasuyuki Umeyama
Yamaha
2
#31
Kazuhide Uchida
Denso
2
#31
Yasushi Kurakake
Yamaha
2
#31
Manabu Kawada
Yamaha
2
#31
Chitoshi Saito
Sanshin Industries
2
#31
Minoru Niigaki
Hamamatsu Photonics K.K.
2
#31
Kazuhiko Wakamori
Hamamatsu Photonics K.K.
2
#31
Takehiro Iida
Hamamatsu Photonics K.K.
2
#31
Kazuhisa Okamura
Yamaha
2
#31
Nobuaki Tsuji
Yamaha
2
#31
Shigehiko Mizuno
Yamaha
2
#31
Seiji Okamoto
NTT
2
1
2
3
Next »