IH

Isao Hayase

HI Hitachi: 40 patents #499 of 28,497Top 2%
HC Hitachi Automotive Engineering Co.: 4 patents #36 of 314Top 15%
HH Hitachi High-Technologies: 1 patents #1,282 of 1,917Top 70%
📍 Tsukuba, JP: #42 of 2,818 inventorsTop 2%
Overall (All Time): #69,025 of 4,157,543Top 2%
43
Patents All Time

Issued Patents All Time

Showing 1–25 of 43 patents

Patent #TitleCo-InventorsDate
12228134 Constant-flow pulseless rotary-vane-type displacement machine 2025-02-18
9644627 Gear pump Takahiro Ito, Tadashi Osaka, Azusa Amino 2017-05-09
9188211 Roller screw Hiroyuki Yamada 2015-11-17
8156833 Linear actuator Kenichiro Tokuo, Hiroyuki Sakamoto, Itsuro Sawada 2012-04-17
7588423 Pump for liquid chromatograph Kunihiko Takao, Kenji Hiraku, Hironori Kaji, Masahito Ito 2009-09-15
7581519 Phase adjusting apparatus and a cam shaft phase adjusting apparatus for an internal combustion engine Seiji Suga, Yoshinori Ichinosawa, Tomoya Tsukada 2009-09-01
7424875 Phase controller and cam shaft phase controller for internal combustion engine Atsushi Watanabe, Seiji Suga, Masahiko Watanabe, Yoshinori Ichinosawa, Takanori Sawada 2008-09-16
7354259 Scroll compressor having a valved back pressure chamber and a bypass for overcompression Isamu Tsubono, Masahiro Takebayashi, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima +2 more 2008-04-08
7150251 Valve timing control apparatus Atsushi Watanabe, Seiji Suga, Takanori Sawada, Tomoya Tsukada 2006-12-19
7137796 Scroll compressor Isamu Tsubono, Masahiro Takebayashi, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima +2 more 2006-11-21
7118358 Scroll compressor having a back-pressure chamber control valve Isamu Tsubono, Masahiro Takebayashi, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima +2 more 2006-10-10
7086359 Rotational phase adjuster Atsushi Watanabe, Shigeaki Yamamuro, Masahiko Watanabe, Yoshiyuki Kobayashi, Atsushi Yamanaka 2006-08-08
7021912 Scroll fluid machine Takeshi Tsuchiya, Takao Mizuno, Mutsunori Matsunaga, Masaru Ohtahara, Syunsuke Yasunori +2 more 2006-04-04
6905318 Compressor including tapered discharged valve and valve seat Takeshi Kouno, Hirokatsu Kohsokabe, Kenichi Oshima, Akihiko Ishiyama 2005-06-14
6769888 Scroll compressor having a valved back pressure chamber and a bypass for overcompression Isamu Tsubono, Masahiro Takebayashi, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima +2 more 2004-08-03
6637550 Displacement type fluid machine Masaki Koyama, Isamu Tsubono, Yuugo Mukai, Koichi Sekiguchi, Kenichi Oshima 2003-10-28
6589035 Scroll compressor having a valved back-pressure chamber and a bypass for over-compression Isamu Tsubono, Masahiro Takebayashi, Koichi Inaba, Koichi Sekiguchi, Kenichi Oshima +2 more 2003-07-08
6494696 Scroll compressor Toshiyuki Terai, Masahiro Takebayashi, Isamu Tsubono, Masaki Koyama, Koichi Sekiguchi 2002-12-17
6352418 Displacement type fluid machine Hirokatsu Kohsokabe, Kunihiko Takao, Masahiro Takebayashi, Hiroaki Hata, Shigetaroo Tagawa +2 more 2002-03-05
6345967 Scroll type fluid machine having different wrap side surface clearances Yuugo Mukai, Isamu Tsubono, Takeshi Tsuchiya, Toshiyuki Terai, Mutsunori Matsunaga 2002-02-12
6332764 Displacement type fluid machine having an orbiting displacer forming a plurality of spaces and method for manufacturing same Hirokatsu Kohsokabe, Masahiro Takebayashi, Hiroaki Hata, Koichi Inaba, Kenji Tojo 2001-12-25
6332763 Displacement type fluid machine having an orbiting displacer forming a plurality of spaces Hirokatsu Kohsokabe, Masahiro Takebayashi, Hiroaki Hata, Koichi Inaba, Kenji Tojo 2001-12-25
6280165 Scroll type fluid machine Takeshi Tsuchiya, Kazuo Sakurai, Mutsunori Matsunaga 2001-08-28
6164941 Displacement type fluid machine having an orbiting displacer forming a plurality of spaces Hirokatsu Kohsokabe, Masahiro Takebayashi, Hiroaki Hata, Koichi Inaba, Kenji Tojo 2000-12-26
5960697 Axial piston machine Shunichi Mitsuya, Takeshi Tsuchiya, Yuzo Kadomukai, Yukio Takahashi 1999-10-05