Cambridge Industries USA, Inc. (CIG USA), a Delaware corporation headquartered in Santa Clara, California, today announced that it has filed Petitions with the Patent Trial and Appeal Board (PTAB) of the U.S. Patent and Trademark Office for Inter Partes Review (IPR) of U.S. patents asserted by Applied Optoelectronics, Inc. (AOI, NASDAQ:AAOI) in AOI’s infringement action, which is pending in the United States District Court for the Northern District of California.

The Petitions seek the cancellation of all claims in the patents as unpatentable, which, as demonstrated in CIG USA’s Inter Partes Review Petitions, are invalid due to anticipation or obviousness. Decisions on whether to institute the IPRs are expected by mid-2025, well in advance of the scheduled District Court trial date in June 2026.

CIG USA remains firmly committed to upholding fairness, integrity, and the true purpose of intellectual property rights—to foster innovation and protect legitimate contributions, not to obstruct healthy competition.

About CIG USA

CIG USA is a wholly owned subsidiary of CIG, a global company with affiliates in the USA, Germany, Japan, China, Malaysia, and other locations. CIG enables data center interconnect through its advanced high-speed optical module products and multi-gigabit broadband connectivity by providing industry-leading wired and wireless solutions. Combining R&D technology leadership with state-of-the-art manufacturing, CIG supports its customers and partners worldwide with millions of devices every year. Products covered by CIG include PON CPEs, home and enterprise Wi-Fi equipment, routers, LTE/5G small cells, and high-speed optical transceivers. Learn more at: https://www.cigtech.com/.

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