Alleman Hall & Tuttle LLP has an active global portfolio development practice, assisting U.S. clients to extend the protections of their U.S. patents and trademarks overseas. The firm has particularly close ties to Europe and Asia, and works in tandem with law firms in Asia and Europe to handle international patent and trademark prosecution, cross-border licensing, foreign patent non-infringement and invalidity studies, foreign patent invalidity proceedings, and trademark oppositions and cancellations. The firm has Japanese speaking staff, including Mark Alleman, who lived and worked in Japan for several years as a registered Foreign Lawyer (Gaikokuho Jimu Bengoshi), and travels to Japan frequently, Atsushi Yoshida who has native Japanese ability and has attained registration to practice as a patent attorney in Japan and the U.S., and Shu Muramoto, who speaks native level Japanese, and advanced German and Chinese.