Tatsuya Koyama

Prior to joining Mayer Brown, Tatsuya worked in the IP group of Hitachi, Ltd. for more than 15 years on a broad range of IP matters—patent licensing strategies, patent litigation support, settlement negotiations, licensing agreements, patent sales agreements, patent portfolio management, patent prosecution, and IP strategy planning, among other work. Based on his significant experience, Tatsuya understands issues from both in-house and private practice perspectives and interprets both to ensure smooth resolution of complex matters. Not only does he interface between both sides, Tatsuya also provides his in-depth thoughts on technical, licensing, and strategic issues, as well as issues that Japanese companies frequently face.

Today, Tatsuya helps clients navigate complex patent disputes involving consumer products and services including smartphones, televisions, personal computers, user interfaces, and streaming services. His technical advice is informed by his master of science in mechanical engineering.

In addition to his extensive patent litigation experience, Tatsuya has advised clients on issues such as trademark, trade dress, copyright, and counterfeit products. Furthermore, Tatsuya helps clients in transactional matters from an IP perspective.

While pursuing his mechanical engineering degree, Tatsuya conducted research on robotic hands and ultrasonic clutches. Tatsuya has published papers in academic journals, presented at international conferences, and obtained patents in the US and Japan.

• Maxell, Ltd. v. Vizio, Inc. (E.D. Tex. 2022-2023) – Representing Maxell in a complex litigation involving breach of contract issues.
• Maxell, Ltd. v. Hisense Co., Ltd. et al. (E.D. Tex. 2019-2020) – Representing Maxell in a complex litigation involving eight patents related to smart televisions such as casting, slide show, user interface, and display control.
• Maxell, Ltd. v. Lenovo Group Ltd. and Motorola Mobility (W.D. Tex. 2021-2023) – Representing Maxell in numerous cases over a period of two years involving over ten patents related to features of smartphones, tablets, laptops, and smartwatches. The cases resulted in a settlement on the eve of the ITC hearing.
• Certain Mobile Electronic Devices and Laptop Computers, 337-TA-1324 (ITC) (2022-2023) – Representing Maxell against Lenovo Group Ltd. and Motorola Mobility in a litigation involving five patents related to biometric authentication, cellular dual connectivity, video transfer, and white balance correction.
• Maxell, Ltd. v. Apple Inc. (E.D. Tex. 2019-2021, W.D. Tex., Germany, and Japan) – Representing Maxell in numerous cases over a period of two years involving over twenty-five patents related to features of smartphones, tablets, laptops, and smartwatches; managed the day-to-day technical aspects of the Japan case including identifying the patents to be asserted and accused functionalities. The cases resulted in a settlement on the first day of the first trial.
• Certain Mobile Electronic Devices and Laptop Computers, 337-TA-1215 (ITC) (2020-2021) – Representing Maxell against Apple Inc. in a complex litigation involving five patents related to biometric authentication, Wi-Fi and LTE 4G handover, face detection, video transfer, and white balance correction.