On September 26, 2025, Unitree Robotics, a leading Chinese robotics company best known for its advanced quadruped robots, successfully defended itself against a patent infringement lawsuit that had been filed during its IPO preparation phase.

The case was heard before the Hangzhou Intermediate People's Court in China and was filed by Hangzhou Luweimei Daily Chemical Co., Ltd., a small-scale enterprise with no direct connection to robotics or AI. The company claimed ownership of a patent for "An Electronic Dog," originally granted to Zhejiang Jianlin Electronic & Electrical Co., Ltd.

The ownership of this patent had changed hands multiple times in 2025, first transferred in February from Jianlin Electric to Hangzhou Lianhao Technology Trading Co., and again in July to Luweimei. The entities involved were found to share overlapping ownership and management links, which raised questions about the timing and motive of the lawsuit.

The plaintiff alleged that Unitree's quadruped robots infringed features described in the "Electronic Dog" patent, such as remote sensing and environmental interaction. However, the court found no infringement, dismissing all claims after concluding that Unitree's products did not embody the patented technical solutions.

The verdict marked the first known patent lawsuit against Unitree since its founding in 2016. Its timing, which was during Unitree's IPO "tutoring" phase, made it particularly significant within China's evolving IP enforcement landscape. By winning the case domestically, Unitree not only cleared a potential financial and reputational obstacle but also demonstrated growing confidence in China's maturing IP judicial system.

For the company, this wasn't just a legal victory; it was a strategic relief that cleared a major obstacle ahead of its public offering and reinforced investor confidence at a crucial moment.

Key Lessons for Innovators and Growing Companies

1. IP risks can emerge at the worst possible time

Legal challenges often appear when a company is most exposed, such as during an IPO, merger, or investment round. Even weak claims can cause major distractions and shake investor confidence.

Tip: Assess potential IP risks early, and perform litigation-readiness checks before high-stakes milestones.

2. Always investigate patent ownership and history

The patent used in this case had changed hands several times before the lawsuit was filed. Multiple transfers and unclear ownership structures can hint at opportunistic claims or "patent trolling."

Tip: Conduct prior art search and verify the full ownership chain of any patents that could overlap with your product or technology, especially in competitive sectors like robotics, AI, or biotechnology.

3. Strong documentation can determine the outcome

Unitree's successful defense relied on technical evidence and documentation that proved its product design did not infringe the claimed patent. Without such records, even groundless cases can become costly or difficult to dismiss.

Tip: Keep comprehensive design files, prototype records, and technical documentation that establish clear product originality and development timelines.

4. Reputation management is part of IP defense

Even when a company wins in court, the mere existence of a lawsuit can influence investor perception and delay funding or IPO approval. Managing communications during these moments is as important as the legal response itself.

Tip: Prepare a public communications plan for potential IP disputes; one that reassures investors and customers while protecting legal confidentiality.

5. Prevention is always cheaper than reaction

Defending against a lawsuit — regardless of the outcome — requires time, resources, and focus that could otherwise be devoted to innovation. Companies that invest in early IP strategy and risk assessment can often prevent such distractions entirely.

Tip: Conduct regular IP reviews, monitor competing filings, and seek professional clearance opinions before product launches.

How NovaLexi Can Help

At NovaLexi, we help innovators, startups, and established businesses turn intellectual property into a strategic advantage while minimizing risk.

Cases like Unitree's show that even strong innovators can face unexpected legal attacks. But with a proactive strategy, sound documentation, and expert guidance, IP challenges can be contained before they threaten growth or investor trust.

Getting IPO- or expansion-ready? Talk to us about how NovaLexi can pressure-test your IP portfolio before your next milestone.