Chongqing Surron Wins Nearly 90 Million RMB in Damages and Permanent Injunction in the US

On May 18, 2026, the U.S. District Court for the Western District of Texas entered a final judgment in the patent infringement case brought by Chongqing Surron Technology Co., Ltd. (“Surron”) against Tanmou Technology Co., Ltd. (hereinafter “Tanmou”), affirming that Tanmou’s infringement was willful, awarding Surron total damages of $12,969,110 (approximately RMB 88.32 million), and issuing a permanent injunction. This ruling marks the conclusion of a three-year cross-border intellectual property dispute with a victory for the original innovator.

Founded in 2014 and headquartered in Dadukou District, Chongqing, Surron is the global pioneer in the light‑weight electric off‑road motorcycle category. In 2016, the company launched the “Light Bee” series of electric off‑road vehicles, which won the German Red Dot Design Award and the ISPO Global Design Award in 2018. Surron’s products are sold in over 60 countries and regions, and the company has filed more than 400 patent applications.

Tanmou was founded in 2019 and is also located in Chongqing. According to court documents and Surron’s public statements, Tanmou Power was established by former Surron employees Wang Mouguang and Ye Mou. The two individuals joined Surron in early 2017, where they were responsible for sales channels and gained access to product design information. During their employment, they allegedly diverted customers to third‑party trading companies and collaborated with external manufacturers to copy Surron’s products, eventually leaving to found Tanmou Power. Tanmou’s models, such as the Talaria Sting MX, are highly similar to Surron’s “Light Bee” in design elements including body contour, frame structure, and battery compartment layout.

Prior to the U.S. litigation, the parties had already engaged in legal battles in China. In April 2025, the Zhejiang Provincial High People’s Court issued a final judgment in a design patent infringement case, holding that Tanmou Power must stop manufacturing and selling the infringing products and pay approximately RMB 668,000 in damages.

Meanwhile, Surron filed a lawsuit in the United States in April 2023, using the Chinese proceedings to obtain evidence and establish its rights, and then leveraging the U.S. action to cover its major overseas markets. The case went to trial in January 2026. Surron’s legal team presented the “Light Bee” and the accused products side by side, conducting a point‑by‑point comparison of details such as frame curvature, swingarm angle, and battery compartment design, and also called an industrial design expert to testify.

On May 18, 2026, Presiding Judge Robert Pitman of the Western District of Texas signed the final judgment. Based on the jury’s verdict, the court awarded total damages of $12,969,110. The court specifically found that “the manufactured article is the infringing motorcycle as a whole,” and calculated the infringer’s entire profits on that basis. In addition, the court confirmed that Tanmou’s infringement was willful, which means Tanmou will also bear Surron’s substantial attorney’s fees.

The court also issued a permanent injunction against Tanmou. The injunction applies not only to Tanmou itself, but also extends to its affiliates, related persons, and those acting in active concert therewith. The injunction comprehensively prohibits Tanmou from making, using, offering to sell, selling, or importing into the United States any infringing products or related core components, as well as from engaging in any advertising or marketing activities related to the infringing products.

This case represents a landmark victory for Chinese enterprises in overseas intellectual property enforcement and provides an important legal precedent for the overseas expansion of original Chinese designs.