Sugimura &amp; PartnersSugimura &amp; Partners Sugimura & Partners History. Sugimura was founded in 1923 by patent attorney and engineer Nobuchika Sugimura. The firm specializes in providing quality legal services in the acquisition, protection and consultation of Japanese IP rights, and is repeatedly ranked among the top Japanese patent and trademark firms. The company has offices in Japan and the United States, as well as professional relationships with associate law firms located in more than 80 countries. In 2017, the firm changed its name from Sugimura International Patent and Trademark Attorneys to Sugimura & Partners. Today, Kenji Sugimura. Principal Patent Attorney, and Koji Sugimura, Principal Attorney at Law  are leading the firm. Offices. It is headquartered in the Kasumigaseki Common Gate West Tower in Kasumigaseki, Chiyoda, Tokyo, Japan, and has a representative office in San Jose, California, U.S.A. Rankings. Sugimura is repeatedly ranked among top Japanese patent and trademark law firms. The firm is consistently ranked on the World IP Survey. The firm has been ranked in the patent prosecution and trademark prosecution categories. World Trademark Review recognizes the firm as a leading trademark professional in Japan. Intellectual Asset Management recognizes the firm as a leading patent professional in Japan. "Asian Legal Business" recognizes the firm as a  leading domestic patent firm. The firm appears in the Legal 100 of Acquisition International magazine, a vanity award Publications. Patent attorneys from Sugimura have featured in or written various articles about IP industries, and have been invited as speakers at various instituesa and IP meetings. Sugimura & Partners History. Sugimura was founded in 1923 by patent attorney and engineer Nobuchika Sugimura. The firm specializes in providing quality legal services in the acquisition, protection and consultation of Japanese IP rights, and is repeatedly ranked among the top Japanese patent and trademark firms. The company has offices in Japan and the United States