Patent attorneys & lawyers

Yoshiteru MIZUMOTO

Director, Patent Attorneys (Mechanical and Electrical)

Yoshiteru MIZUMOTO


As a patent attorney
Yoshiteru Mizumoto is a patent attorney in the Mechanical and Electrical Department, where he handles a wide variety of patent applications, office actions (dealing with reasons for rejection issued by patent offices), domestic patent applications for both overseas and domestic clients, and overseas patent applications for domestic clients. In all, he has more than thirteen years of experience as a patent attorney.

Mr. Mizumoto also handles appeals when patents are rejected and has worked with lawyers from Asamura Law Offices in litigation to rescind trial decisions when appeals are unsuccessful.

In addition to patent applications, Mr. Mizumoto often provides appraisals to determine whether products infringe patents. He also worked alongside Asamura Patent Office lawyers in an invalidation trial where a Japanese company had requested the invalidation of a patent obtained by Asamura Patent Office for one of its overseas clients. The patent was successfully defended after a year-long effort. He was also part of a team carrying out a prior-art search to help invalidate a specific patent.

Mr. Mizumoto is a member of the PCT Committee of Asamura Patent Office.


Mr. Mizumoto’s graduation dissertation at the Shibaura Institute of Technology dealt with vibration analysis of space structures (models) using the Rayleigh?Ritz method. He then joined Sokkia Co., Ltd., and subsequently conducted standard scale length measurement research at the National Research Laboratory of Metrology (now the National Institute of Advanced Industrial Science and Technology) and was involved in the research and development of the technology and related intellectual property management for an apparatus to measure two-dimensional coordinates. As part of their intellectual property management, Sokkia instituted an action to prohibit a company from infringing a patent owned by them, and Mr. Mizumoto was a member of the litigation team, largely composed of intellectual property lawyers and patent attorneys.

After passing the Patent Attorney Examination in 2004, Mr. Mizumoto joined the Mechanical Department of Seiwa Patent & Law firm in September the following year, where he learned the basics in such areas as domestic patent applications by overseas and domestic clients, related office actions, and appraisals.

As a member of Japan Patent Attorneys Association (JPAA)

After joining Seiwa, Mr. Mizumoto registered as a patent attorney and became a member of the Japan Patent Attorneys’ Association (JPAA). In 2006, he served as a member of the JPAA’s Publicity Center, where he took part in press conferences. Having joined Asamura Patent Office, he served on the Second Patent Committee (2011?2012) of the JPAA, both in a subcommittee which looked at examinations of patent applications in English received by the Japan Patent Office (2011) and in a subcommittee that considered issues surrounding Japan’s participation in the Patent Law Treaty (2012). Since 2013, as the Vice Chairperson of the Second Patent Committee, Mr. Mizumoto has been serving as Chairman of the Fifth Subcommittee, which compares examinations of the written descriptions of patent applications filed with the IP5 group of the world’s five largest intellectual property offices (the European Patent Office, the Japan Patent Office, the Korean Intellectual Property Office, the State Intellectual Property Office of the People’s Republic of China, and the United States Patent and Trademark Office).

BSc in Mechanical Engineering, Shibaura Institute of Technology, March 1992
MSc in Mechanical Engineering, Shibaura Institute of Technology, March 1994
Professional career
Joined Sokkia Co., Ltd., April 1994
Joined a patent office, September 2005
Entered Asamura Patent Office, p.c., January 2010
Examinations passed
Passed the Patent Attorney Examination:
November 2004
Registration for Patent Attorney:September 2005
Registration Number of Patent Attorney:14002
Mechanical and Electrical Department
Japansese, English
Specialty Fields
General machinery, measuring devices, coordinate measuring machines, packaging containers, engines, actuators, machine tools, stents, hospital waste processing devices, fluid separation devices, degasifiers, radiation therapy equipment, implants, rackets, transfer valves, cardboard, cultivation beds, packaging bands, etc.
FAA Airplane Single- and Multi-Engine Land, 1987
Single-engined aircraft takeoff, 1988
Airworthiness Division of Japanese Ministry of Land, Infrastructure, Transport and Tourism
Multi-Engine Landing, 1990
Airworthiness Division of Japanese Ministry of Land, Infrastructure, Transport and Tourism
EIKEN Test in Practical English Proficiency (Grade Pre-1), 2012

Member of the Japan Patent Attorneys Association (JPAA), 2005 - present
Member of the JPAA Publicity Center Committee, 2006
Member/Vice-Chairman of the JPAA Patents Committee, 2013 - 2017
“Intellectual Property These Days, 9: Misappropriate Submissions for Patents in China” FB Lecture Series, (Senken Shimbun), (July 23, 2013)
Jogging about 30 km once a week (aiming for over 40 km)
With over 24 years’ experience in development and intellectual property, I feel confident that I can provide clients with the very best service. Working with clients, I make it my mission to ensure that their patent applications are successful and their intellectual property rights are fully protected.
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