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The confiscated product, called the Trotter, isn’t like most hoverboards we’ve seen. The raided company, Changzhou First International Trade, had on display an electronic one-wheeled skateboard with a large gyroscopic wheel placed in the center of the board. The one-wheeled skateboard gives the sensation of hovering when ridden.

However, Silicon Valley startup Future Motion contends Changzhou First International Trade Co.’s hoverboard was actually a knock-off of their Onewheel hoverboard. Future Motion designer Kyle Doerksen said he invented Onewheel, displayed the prototype at CES 2014, and even launched a successful Kickstarter that raised $630,000. Both the design and underlying technology of Onewheel are patented. According to Bloomberg, Future Motion decided against getting a booth at CES 2016 but was in town to meet potential business partners.

Related: Onewheel by Future Motion is a Self-Balancing Electric Skateboard that Lets You Glide Over the Pavement

In comparison to Onewheel’s retail price of $1,500, Changzhou First International Trade Co.’s Trotter, which looks identical, was listed on Alibaba for $550 apiece for some 20 boards. “We said, ‘Wow, that’s clearly a knockoff,’” Doerksen said to Bloomberg. After unsuccessful attempts at contacting Changzhou First International Trade, Future Motion filed a request with a judge on Wednesday to take Trotters out of the trade show.

The federal marshals’ raid stripped the Chinese company’s booth of all its merchandise and signage. The three-day CES event ends tomorrow. “If customers start to view the space as full of low-quality, low-cost products, that reflects poorly on everybody,” said Doerksen to Bloomberg. “We hate to see someone poison the well.”

Via Bloomberg

Screen caps via Bloomberg; images via Onewheel, Changzhou First International Trade Co.