Canadian Solar wins patent dispute against Maxeon at USPTO

The U.S. Patent Trial and Appeal Board ruled in favor of Canadian Solar Inc. (NASDAQ: CSIQ) in patent litigation against Maxeon Solar Pte. Ltd., invalidating all patent claims that Maxeon had asserted against the Canadian company.

In Final Written Decisions issued by the Patent Trial and Appeal Board of the U.S. Patent and Trademark Office, the board determined that all claims related to alleged patent infringement in federal court litigation were invalid. The ruling addresses patents that Maxeon had claimed Canadian Solar infringed upon.

"The final decision issued by the USPTO once again affirms that Canadian Solar's technology and legal teams have always respected and placed great importance on protecting both our own and our peers' intellectual property," said Colin Parkin, President of Canadian Solar. "At the same time, we firmly oppose the misuse or weaponization of patents—particularly those lacking patentability or practical value—which can distort competition and impede genuine innovation."

Canadian Solar reported that it has filed more than 5,000 patent applications and has been granted more than 4,000 patents to date.

The Kitchener, Ontario-based company manufactures solar photovoltaic modules and develops solar energy projects. Canadian Solar has delivered nearly 170 GW of solar modules globally over 24 years of operation. Through its e-STORAGE subsidiary, the company shipped over 16 GWh of battery energy storage solutions as of September 30, 2025, with a $3.1 billion contracted backlog as of October 31, 2025.

Canadian Solar has been publicly traded on NASDAQ since 2006. The information is based on a company press release.

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