Kazushige Yokoyama

Kazushige Yokoyama

Dr. Yokoyama began his career at a patent office and then transitioned to work at manufacturers and in the service industry, where he gained experience in intellectual property practice. In his previous position, Dr. Yokoyama was employed at a food service business, and was in charge of acquisition of rights for patents and trademarks and the establishment and implementation of IP strategies based on management policy. He leverages his experience at both patent offices and the IP departments of companies to consistently provide client-focused IP services.


Patent Attorney




Japan Patent Attorneys Association

Areas of Legal Expertise

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

Areas of Technological Expertise

Machinery, Control Devices, Chemistry

Professional Experience

2019 – present

Sonderhoff & Einsel, Law and Patent Office

2016 – 2018

Zensho Holdings Co, Ltd.

2008 – 2016

Bridgestone Corporation

2003 – 2007

Toyota Technical Development Corporation

2000 – 2003

Weno & Partners



Toyota Technological Institute, Graduate School of Engineering, PhD in Extreme Materials


Nagasaki University School of Engineering, Graduate School of Engineering, MSc in Materials Science


Nagasaki University School of Engineering, BA in Materials Engineering


Japanese, English