Hiroyasu Ninomiya


Mr. Ninomiya has broad experience working at the engine design and development division of a major automobile manufacturer where he was involved in the design and development of diesel engines. He advises on inbound and outbound work and patent prosecutions and handles a large number of inventions using his expertise in the technological fields of automobile parts, engine structures, engine controls, structures and controls for automobiles & other vehicles, printers, semiconductor manufacturing equipment, musical instruments and glass.


Patent Attorney


Japan Patent Attorneys Association (2004)

Areas of Legal Expertise

Patent and utility model applications, trials and appeals, expert opinions, litigations

Areas of Technological Expertise

General mechanical, automobile parts, engine control devices, and optical instruments

Professional Experience

2014 – present

Sonderhoff & Einsel, Law and Patent Office

2012 – 2014

Sonderhoff & Einsel (Beijing) Intellectual Property Agency Co., Ltd.

2006 – 2012

Sonderhoff & Einsel Law & Patent Office

2001 – 2006

Chuo International Patent Firm

1999 – 2001

Isuzu Motors, Ltd. (Engine development)


1995 – 1999

Waseda University, Mechanical engineering


Japanese, English