Shuichi Sumiyoshi

Mr. Sumiyoshi has been engaged in inbound and outbound work, patent prosecutions, disputes, and drafting patent applications and expert opinions. He advises on a large number of inventions with expertise in the technological fields of polymers, drugs, peptides, catalysts, organic synthesis, storage batteries, coatings, adhesives, metals and semiconductor materials, and also handles cases in fields such as thermal control devices, optical related devices, heating furnaces, and connectors for use in civil engineering and automobile parts. He also has extensive work experience in dealing with IP issues in the area of environmental clean-up technology.


Patent Attorney


Qualified IP Litigator (2008)
Japan Patent Attorneys Association (2006)

Areas of Legal Expertise

Patents and utility model applications, trials and appeals, expert opinions, and litigation

Areas of Technological Expertise

General chemical fields, organic chemistry, general mechanical, biochemistry, molecular biology

Professional Experience

2008 –¬†present

Sonderhoff & Einsel, Law and Patent Office

2006 – 2008

International Patent Office Dr. Kawawa & Partners

2003 – 2005

Shimadzu Techno-Research, Inc.

1994 – 2002

3I Technical Research KK

1990 – 1993

Tokai Carbon KK


1986 – 1990

Tokyo University of Science, Applied biology


Japanese, English