An Overview | About Us | OHTSUKA PATENT OFFICE

Established: April 1, 1974
Telephone: +81 3-5276-3241
Email: opt@patest.co.jp
Address: 7th fl., Kioicho Park Bldg.,
3-6, Kioicho, Chiyoda-ku, Tokyo, Japan
Members: 85
Outline of our Services: Patent counseling and prosecution including patent portfolio strategic planning, interviewing inventors, drafting claims and specification

Litigation in the IP field including patent infringement, litigation support both inside and outside Japan, and patent invalidation before the JPO and courts

Analysis and evaluation of patents, patent search, and clearance study, consultation on protecting, managing, and utilizing technical and intellectual assets, including establishing a patent strategy

Registration of trademarks and designs and consultation therefor, and consultation on business strategy based on clearance search for trademarks and designs