Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
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Toshio Masuda — 64 Patents

Hitachi: 23 patents #1,433 of 28,497Top 6%
SUSubaru: 18 patents #25 of 1,436Top 2%
HHHitachi High-Technologies: 8 patents #394 of 1,917Top 25%
Mitsubishi Electric: 3 patents #8,691 of 25,717Top 35%
PEPentax: 2 patents #187 of 396Top 50%
SISanyo Chemical Industries: 2 patents #123 of 607Top 25%
UNUnknown: 1 patents #29,356 of 83,584Top 40%
HOHoya: 1 patents #757 of 1,290Top 60%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
SCShinko Electric Industries Co.: 1 patents #437 of 723Top 65%
TIToray Industries: 1 patents #2,000 of 3,690Top 55%
Overall (All Time): #34,624 of 4,157,543Top 1%
64 Patents All Time

Issued Patents All Time

Showing 26–50 of 64 patents

Patent #TitleCo-InventorsDate
7048869 Plasma processing apparatus and a plasma processing method Kazue Takahashi, Tetsunori Kaji, Ken'etsu Yokogawa 2006-05-23
6923885 Plasma processing system and apparatus and a sample processing method Tatehito Usui, Mitsuru Suehiro, Hiroshi Kanekiyo, Hideyuki Yamamoto, Kazue Takahashi +1 more 2005-08-02
6881352 Disturbance-free, recipe-controlled plasma processing method Akira Kagoshima, Hideyuki Yamamoto, Shoji Ikuhara, Hiroyuki Kitsunai, Junichi Tanaka +2 more 2005-04-19
6828165 Semiconductor plasma processing apparatus with first and second processing state monitoring units Junichi Tanaka, Hiroyuki Kitsunai, Akira Kagoshima, Daisuke Shiraishi, Hideyuki Yamamoto +1 more 2004-12-07
6815365 Plasma etching apparatus and plasma etching method Kazue Takahashi, Mitsuru Suehiro, Tetsunori Kaji, Saburo Kanai 2004-11-09
6796269 Apparatus and method for monitoring plasma processing apparatus Ichiro Sasaki, Muneo Furuse, Hideyuki Yamamoto 2004-09-28
6776872 Data processing apparatus for semiconductor processing apparatus Junichi Tanaka, Akira Kagoshima, Shoji Ikuhara, Hideyuki Yamamoto 2004-08-17
6755932 Plasma processing system and apparatus and a sample processing method Tatehito Usui, Mitsuru Suehiro, Hiroshi Kanekiyo, Hideyuki Yamamoto, Kazue Takahashi +1 more 2004-06-29
6745096 Maintenance method and system for plasma processing apparatus etching and apparatus Hideyuki Yamamoto, Shoji Ikuhara, Akira Kagoshima, Junichi Tanaka 2004-06-01
6733618 Disturbance-free, recipe-controlled plasma processing system and method Akira Kagoshima, Hideyuki Yamamoto, Shoji Ikuhara, Hiroyuki Kitsunai, Junichi Tanaka +2 more 2004-05-11
6706543 Method of monitoring and/or controlling a semiconductor manufacturing apparatus and a therefor Junichi Tanaka, Hiroyuki Kitsunai, Akira Kagoshima, Daisuke Shiraishi, Hideyuki Yamamoto +1 more 2004-03-16
6677167 Wafer processing apparatus and a wafer stage and a wafer processing method Seiichiro Kanno, Hironobu Kawahara, Mitsuru Suehiro, Saburou Kanai 2004-01-13
6626268 Elevator door opening and closing device and opening and closing control method Yasuyuki Oikawa 2003-09-30
6616759 Method of monitoring and/or controlling a semiconductor manufacturing apparatus and a system therefor Junichi Tanaka, Hiroyuki Kitsunai, Akira Kagoshima, Daisuke Shiraishi, Hideyuki Yamamato +1 more 2003-09-09
6533075 Elevator group supervisory control system for processing hall call information 2003-03-18
6506686 Plasma processing apparatus and plasma processing method Kazue Takahashi, Ryoji Fukuyama, Tomoyuki Tamura 2003-01-14
6503364 Plasma processing apparatus Tatehito Usui, Shigeru Shirayone, Kazue Takahashi, Mitsuru Suehiro 2003-01-07
6422172 Plasma processing apparatus and plasma processing method Jyunichi Tanaka, Toru Otsubo, Ichiro Sasaki, Tetsunori Kaji, Katsuya Watanabe 2002-07-23
6245190 Plasma processing system and plasma processing method Katsuhiko Mitani, Tetsunori Kaji, Jun'ichi Tanaka, Katsuya Watanabe, Shigeru Shirayone +4 more 2001-06-12
6171438 Plasma processing apparatus and plasma processing method Kazue Takahashi, Mitsuru Suehiro, Tetsunori Kaji, Saburo Kanai 2001-01-09
6145923 Automobile frontbody structure 2000-11-14
6086141 Body structure for motor vehicle Masayuki Honma 2000-07-11
5994439 Vinyl chloride resin composition for powder molding Manabu Ogiwara, Hideaki Hayashi, Junzo Ukai, Hideo Nishimura 1999-11-30
5893978 Purifying method and purification system for lakes and marshes Hiroaki Yoda, Shiro Nakadaira, Takashi Mizumori, Koichi Tsuzuki 1999-04-13
5820204 Body structure for a motor vehicle Masayuki Honma 1998-10-13