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 26–43 of 43 patents

Patent #TitleCo-InventorsDate
5938417 Scroll type fluid machine having wraps formed of circular arcs Kunihiko Takao, Hirokatsu Kohsokabe, Masahiro Takebayashi, Kenichi Oshima 1999-08-17
5531577 Scroll type fluid machine having a lever driving mechanism Shigeru Machida, Shunichi Mitsuya, Takeshi Kouno 1996-07-02
5231914 Variable displacement compressor Kenji Tojo, Kunihiko Takao, Yasushi Muramoto, Yukio Takahashi, Masaru Ito +2 more 1993-08-03
5105728 Balanced variable-displacement compressor Yasushi Muramoto, Kenji Tojo, Kunihiko Takao, Masaru Ito, Atsuo Kishi +3 more 1992-04-21
5063829 Variable displacement swash plate type compressor Kunihiko Takao, Kenji Tojo, Yukio Takahashi, Masaru Ito 1991-11-12
5009577 Rotary compressor of variable displacement type Kunisuke Tejima 1991-04-23
4929159 Variable-displacement rotary compressor Kenichi Ushiku, Kunisuke Tejima, Seiichi Hayashi, Kazuhiko Satoh 1990-05-29
4815195 Method of combining plurality of parts and structure of plurality of parts combined by same Kazuhiro Tsuruoka, Hisanobu Kanamaru, Takefumi Ohwada, Masao Mizukami 1989-03-28
4815943 Variable displacement wobble plate compressor with capacity control valve Kenichi Kawashima, Kenji Emi, Akira Tezuka, Kosaku Sayo, Toshikazu Ito +9 more 1989-03-28
4801248 Variable capacity swash plate compressor Kenji Tojo, Yuzo Kadomukai, Kunihiko Takao, Yozo Nakamura, Atsushi Suginuma +1 more 1989-01-31
4723895 Method of and apparatus for effecting volume control of compressor 1988-02-09
4711620 Moving vane type compressor Yukio Takahashi, Keijirou Amano, Masao Mizukami, Masaaki Ishiguri 1987-12-08
4636148 Vane type compressor with volume control Kunihiko Takao, Kenichi Kawashima, Yozo Nakamura 1987-01-13
4619595 Capacity control device for compressor Keijiro Amano, Atsuo Kishi, Noriharu Sato 1986-10-28
4608002 Rotary vane compressor with hook-like suction passage Atsuo Kishi 1986-08-26
4515513 Rotary compressor with inner and outer cylinders and axial insert type discharge valves Masao Mizukami, Atsuo Kishi 1985-05-07
4515514 Vane-type rotary machine Atsushi Suginuma, Atsuo Kishi, Kenichi Kawashima 1985-05-07
4507068 Vane type rotary machine Atsushi Suginuma, Atsuo Kishi 1985-03-26