Junichi Maekawa


Mr. Maekawa, who heads our patent division’s department for mechanical and electrical engineering, is experienced in inbound and outbound work, patent prosecutions, disputes, and drafting expert opinions and patent applications. His expertise is in the technological fields of printing, automobiles (brakes, suspensions, steering, engines, etc.), lighting devices (headlights for vehicles, etc.), liquid crystals, semiconductors, medical devices, gaming machines, computers, and software. Mr. Maekawa advises from both a corporate and engineer’s perspective after spending many years in the R&D and IP divisions of a major document processing company where he was involved in the development of mechanical parts for the world’s fastest printers, as well as in leveraging patent rights in licensing negotiations.


Patent Attorney


Japan Patent Attorneys Association (2000)

Areas of Legal Expertise

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

Areas of Technological Expertise

General mechanical, control devices, and software

Professional Experience

2012 – present

Sonderhoff & Einsel, Law and Patent Office

2004 – 2012

Primeworks IP Attorneys

1991 – 2012

Fuji Xerox Co., Ltd.


1987 – 1991

Keio University, Mechanical engineering


Japanese, English, German