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Latest external collaboration on country level. Dive into details by clicking on the dots.

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Dive into the research topics where Ryoichi Koga is active.

Publication


Featured researches published by Ryoichi Koga.


Archive | 1990

Earthquake detecting apparatus

Hiroo Iwabuchi; Ryoichi Koga; Takashi Uno; Oohashi Tokuyoshi


Archive | 2004

Washing nozzle and toilet device using the same

Tomoaki Kitano; Yasuhiro Kawamoto; Tomoko Ishida; Ryoichi Koga; Tomio Arikawa; Koji Yoshimoto; Hiroaki Fujii; Shinichi Maruyama


Archive | 1997

Solution pump for absorption heat pump and manufacture thereof

Ryoichi Koga; Takashi Sawada; 良一 古閑; 敬 澤田


Archive | 2008

Nozzle device and sanitary washing equipment using the same

Ryoichi Koga; Hidefumi Matsui; Mitsumasa Matsumura; 良一 古閑; 英史 松井; 充真 松村


Archive | 2010

An ejection apparatus and a sanitary cleaning device using the apparatus

Ryoichi Koga; Hidehiko Nitta


Archive | 2009

Hot water tank for sanitary washing apparatus and sanitary washing apparatus including the same

Ryoichi Koga; Kenji Matsui; Hidehiko Nitta; 良一 古閑; 英彦 新田; 健治 松井


Archive | 2007

Nozzle device and sanitary washing apparatus employing it

Tomio Arikawa; Ryoichi Koga; Toru Ueno; 徹 上野; 良一 古閑; 富夫 有川


Archive | 1999

Air cleaner and toilet air conditioning device using the air cleaner

Ryoichi Koga; Munehiko Tokumoto; Katsuhiro Yabuuchi; 良一 古閑; 棟彦 徳本; 勝博 薮内


Archive | 2012

Heat exchanger and hygienic cleaning toilet seat provided therewith

Yasuhiro Kuniki; 靖博 國木; Ryoichi Koga; 良一 古閑


Archive | 1994

Solution pump for absorption type heat pump

Takahito Ishii; Masaru Ito; Yasuhiro Kawamoto; Ryoichi Koga; Yasuhiro Kondo; Masao Noguchi; Takashi Sawada; 勝 伊藤; 良一 古閑; 恭宏 河本; 敬 澤田; 隆仁 石井; 保広 近藤; 正夫 野口

Collaboration


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