The Patent Trial and Appeal Board of the U.S. Patent and Trademark Office (USPTO) has invalidated all claims by Trina Solar on two TOPCon (Tunnel Oxide Passivated Contact) solar cell patents against certain subsidiaries of Canadian Solar. The USPTO also named three of Canadian Solar’s U.S. subsidiaries as directly or indirectly infringing on two of its TOPCon-related U.S. patents.
