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President / Patent Attorney  Hiroshi Arafune
(Authorized to represent in specific infringement litigations)
Expertise & experience
Electronic devices / Amusement machine / Auto parts / Machinery / Motorcycle / Toys¡Êelectronic robots, educational equipments, game console, toy trains, travelling toys, etc.¡Ë / Construction and civil engineering / Other mechatronics / Designs and trademarks (all professional practice including research and legal advice)
Educational background
Faculty of Engineering, Department of Mechanical Engineering, Saitama University
Vice-president / Patent Attorney  Yoshio Arafune
Expertise & experience
Electronic devices / semiconductor production equipment / Machinery / Optical equipment / Toys¡Êelectronic robots, educational equipments, game console, toy trains, travelling toys, etc.¡Ë / Copy machine / Designs and trademarks (all professional practice including research and legal advice)
Educational background
Faculty of Engineering, Department of Mechanical Engineering, Saitama University
Vice-president / Patent Attorney  Tomio Obinata
Expertise & experience
Electronic circuit / Semiconductive device / Information processing / Telecommunication equipments / Electronic control system / Game console / LCD equipments / Semiconductor production equipments / Automotive / Motorcycle / Mechatronic
Educational background
Faculty of Engineering, Department of Mechanical Engineering, Saitama University
Patent Attorney  Takashi Akazawa
Expertise & experience
Machinery / Amusement machine / Metal material / Construction and civil engineering / Information processing
Educational background
Industrial Engineering, Faculty of Engineering, Graduate School of Yokohama National University
Patent Attorney  Tatsuharu Inaba
(Authorized to represent in specific infringement litigations)
Expertise & experience
Machinery¡ÊOptical / magnet recording, operating machines, hydraulic, image-forming, medical appliance, Semiconductor manufacturing¡Ë
Educational background
Graduate School of Engineering, Meiji University
Patent Attorney  Kanako Boda
Expertise & experience
Chemistry / Machinery / Construction and civil engineering / Electricity / Information processing
Educational background
Department of Chemistry, Faculty of Science and Technology, Sophia University
Patent Attorney  Minori Uchida
Expertise & experience
Electricity / Telecommunications / Information processing / Design / Trademarks
Educational background
Department of Physics, Graduate School of Science, Ochanomizu University
Patent Attorney  Masako Okada
(Authorized to represent in specific infringement litigations)
Expertise & experience
Machinery / Design / Trademarks
Educational background
Department of Law, Faculty of Law, Keio University
Patent Attorney  Kimika Anzai
Expertise & experience
Electricity / Telecommunications / Information processing
Educational background
Department of French Studies, Tokyo University of Foreign Studies
Faculty of Engineering Division II, Department of Electrical Engineering, Tokyo University of Science
Patent Attorney  Yoshihiro Asano(Ph.D.)
Expertise & experience
Electromagnetic, Telecommunication, and Network technologies/ Information processing, Data processing / Control engineering, Software and Measurement / Electrical device, Electronic device and Semi-conductor
Educational background
Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo
Patent Attorney  Masatoshi Yoshizaki
Expertise & experience
Machinery
Educational background
Department of Mechanical Engineering, Faculty of Science and Technology, Sophia University
Patent Attorney  Hiroyuki Kobayashi
Expertise & experience
Display Device / Optical / Semiconductor / Machinery
Educational background
Department of Physics, Faculty of Science and Technology, Keio University
Patent Attorney  Yuji Matsumoto
Expertise & experience
Electron¡¦Electricity / Mechanism / Optical / Telecommunication
Educational background
Department of Physics, Faculty of Science, Saitama University
Patent Attorney  Kohei Akiyoshi
Expertise & experience
Foreign Patents / Machinery / Chemistry
Educational background
Division of Forest and Biomaterials Science, Graduate School of Agriculture, Kyoto University
Patent Attorney  Yoshiki Fujiwara
Expertise & experience
Amusement machine / Machinery / Electricity / Construction and civil engineering
Educational background
Department of Electronic Chemistry, interdisciplinary Graduate school of Science and Engineering, Tokyo Institute of Technology
Patent Attorney  Tomohiro Watanabe
Expertise & experience
Chemistry / Material
Educational background
Department of Agriculture, Graduate School of Agriculture, Tokyo University of Agriculture and Technology
Patent Attorney  Kunio Yamaguchi
Expertise & experience
Electricity / Machinery / Design / Trademark
Educational background
Department of Electrical Engineering Faculty of Engineering, Hosei University
Patent Attorney  Takashi Yamaguchi
Expertise & experience
Electricity / Information processing / Machinery
Educational background
Department of Physics College of Science and Technology, Nihon University Department of Electrical Engineering Faculty of Engineering Division ­¶,Tokyo University of Science
Patent Attorney  Kentaro Masuda
Expertise & experience
Machinery / Production machinery / Precision machinery / Packaging machinery / Office equipments / Transportation machinery / Construction and civil engineering / Electronic devices / Display devices / Optical
Educational background
Department of Production Mechanical Engineering, Graduate school of Science and Engineering, Tokyo Institute of Technology
Patent Attorney  Akihito Kotake
(Authorized to represent in specific infringement litigations)
Expertise & experience
Electricity / Machinery / Auto parts / Power equipment / Network technology / Mechatronics / Civil engineering and construction / Nano technology / Design
Educational background
Faculty of Engineering¡¤Nagoya Institute of Technology
Department of Electrical Engineering and Computer Science,Master of Science, George Washington University
Patent Attorney  Yasufumi Fujita
(Authorized to represent in specific infringement litigations)
Expertise & experience
Machinery / Designs and trademarks (all professional practice including research and legal advice)
Educational background
Department of Law, Faculty of Law, Nihon University
Patent Attorney  Norio Nagaoka
Expertise & experience
Designs and trademarks (all professional practice including research and legal advice)
Educational background
Department of Economics, School of Political Science and Economics, Waseda University
Patent Attorney  Naru Koike
Expertise & experience
Chemistry / Material / Machinery
Educational background
Department of Chemistry, Graduate School of Science, Osaka City University
Patent Attorney  Satoshi Asakura
Expertise & experience
Chemistry / Material / Machinery / Design / Trademarks
Educational background
Department of Applied Chemistry, Graduate School of Engineering, Gifu University
Patent Attorney  Takuhiro Kitao
Expertise & experience
Foreign applications / Physical Engineering / Machinery
Educational background
Department of Physics, Graduate School of Science, University of Tokyo

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Attorney-at-Law  Hideto Nakai
Educational background
1992¡¡Graduated Faculty of Law, Waseda University
1999¡¡Passed National Bar Exam
2001¡¡Registered as Attorney-at-Law
2002¡¡Joined Koyo International Patent Firm
Official service
Member of conciliation of civil affairs committee at Tokyo Summary Court
Attorney-at-Law, Patent Attorney  Koji Onoue
Educational background
2002¡¡Graduated Faculty of Science and Engineering, Sophia University
2015¡¡Graduated Hosei University Lawschool
2015¡¡Passed National Bar Exam
2017¡¡Registered as Attorney-at-Law
2023¡¡Joined Koyo International Patent Firm
2023¡¡Registered as Patent Attorney
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