TU

Tsutomu Udagawa

HC Hitachi Construction Machinery Co.: 17 patents #67 of 1,234Top 6%
📍 Tsukuba, JP: #195 of 2,818 inventorsTop 7%
Overall (All Time): #268,883 of 4,157,543Top 7%
17
Patents All Time

Issued Patents All Time

Showing 1–17 of 17 patents

Patent #TitleCo-InventorsDate
12152374 Construction machine Junji Yamamoto, Shigeyuki Sakurai, Yukihito Suzuki, Hidenobu Tsukada, Atsushi Kanda 2024-11-26
12077944 Construction machine Junji Yamamoto, Shigeyuki Sakurai, Yukihito Suzuki 2024-09-03
11274418 Hydraulic work machine Shigeyuki Sakurai, Yukihito Suzuki 2022-03-15
10400797 Hydraulic control system for working machine Hiroaki Tanaka, Yasutaka Tsuruga, Kazunori Nakamura 2019-09-03
10330128 Hydraulic control system for work machine Hidekazu Moriki, Shinya Imura, Ryohei Yamashita, Kouji Ishikawa 2019-06-25
10060450 Hydraulic control device for work machine Akira Nakayama, Ryohei Yamashita, Shiho Izumi, Manabu Edamura, Kouji Ishikawa +1 more 2018-08-28
9695841 Hydraulic closed circuit system Hiroaki Tanaka 2017-07-04
9212469 Work machine Kazuo Fujishima, Koji Ishikawa, Hidetoshi Satake, Yuichi Kunitomo 2015-12-15
9103093 Rotation control device of working machine Mitsuo Sonoda, Manabu Edamura, Takenori Hiroki, Manabu Sugiura, Hidetoshi Satake 2015-08-11
8818649 Rotation control device for working machine 2014-08-26
8585156 Travel control device for work vehicle and work vehicle Eiji Egawa, Tsukasa Toyooka, Makoto Sugaya, Hideo Sorata, Tsuyoshi Nakamura +3 more 2013-11-19
8146691 Travel drive system for work vehicle, work vehicle, and travel drive method Akira Nakayama, Tsukasa Toyooka, Makoto Sugaya 2012-04-03
7712565 HST travel system for working machine Eiji Egawa, Akira Nakayama, Kazuo Takiguchi, Tsukasa Toyooka, Makoto Sugaya +1 more 2010-05-11
7500360 Hydraulic driving system of construction machinery Kazuo Takiguchi, Masami Ochiai, Takashi Yagyuu, Yukihiko Sugiyama, Mitsuo Aihara 2009-03-10
7175155 Control valve apparatus and pressure circuit Kazuo Takiguchi, Masami Ochiai, Katsumi Ueno, Takashi Yagyu, Yukihiko Sugiyama +1 more 2007-02-13
6644629 Overwinding prevention device for winch Shinobu Higashi, Kazuhisa Ishida, Kouji Funato, Toshimi Sakai, Masami Ochiai +2 more 2003-11-11
6339929 Swivel control apparatus Teruo Igarashi, Masami Ochiai, Toshimi Sakai, Kazuhisa Ishida, Kouji Funato 2002-01-22