Resonant Systems Inc.

Resonant Systems Inc. is a Japanese company founded on December 12, 1952, and is a subsidiary of FUJI KYUKO CO.,LTD.. Headquartered in Yokohama-shi, Kanagawa Prefecture, Japan, the company has 125 employees as of May 1, 2026.

Resonant Systems Inc. develops, manufactures, and sells safety confirmation equipment and broadcasting devices utilizing voice synthesis technology for railway vehicles, buses, and trucks. They also offer management systems for golf course carts and hotels. Their main products include broadcasting devices for route buses, and they were the first in Japan to release an announcement device using magnetic tape in 1962. They have since developed and improved full voice synthesis broadcasting devices.

The company's patent litigation posture indicates it is an operating company defending against assertions. Resonant Systems Inc. has been a defendant in two tracked cases, both at the Patent Trial and Appeal Board, with no appearances as a plaintiff. This suggests that the company is primarily focused on its product and service offerings and defends against challenges to its intellectual property.

Notable cases include Nintendo Co., Ltd. et al. v. Resonant Systems Inc. and Apple Inc. v. Resonant Systems Inc., both filed at the Patent Trial and Appeal Board where Resonant Systems Inc. is listed as the defendant.