Stratasys has been awarded approximately $27.6 million in past damages in the first of two patent infringement cases against Bambu Lab and affiliate organisations.
Those affiliate organisations include Shanghai Lunkuo Technology Co. Ltd., Tuozhu Technology Limited, and Shenzhen Tuozhu Technology Co. Ltd.
After a week-long trial, a jury in the U.S. District Court for the Eastern District of Texas, Marshall Division, returned a verdict in favour of Stratasys in relation to four of five patent infringements alleged by the company in 2024 (United States Patent No. 9,421,713, United States Patent No. 7,555,357, United States Patent No. 9,168,698, and United States Patent No. 10,556,381). Stratasys says the jury found the four patents were valid and infringed, while Bambu Lab has since confirmed the other one (United States Patent No. 9,592,660) was found to be invalid by the Patent Trial and Appeal Board (PTAB). Stratasys did not appeal the verdict on this fifth alleged patent infringement.
A Stratasys statement remarked that the company 'greatly appreciates the jury’s careful consideration of this case and the Court’s able stewardship of the proceedings in the Marshall division of the U.S. District Court for the Eastern District of Texas.' It went on to say that the company 'remains focused on delivering cutting-edge technologies to customers and protecting the intellectual property that underpins our innovation.' The company also says a second patent infringement case has not yet been set for trial.
Relating to the four patents that the U.S. District Court for the Eastern District of Texas, Marshall Division, has found to be infringed, Bambu Lab released the following statement: "We appreciate the time and effort of the jury in considering this matter. While we respect the judicial process, we disagree with the verdict reached in this case. The law provides Bambu with the right to seek post-trial review and to appeal, and Bambu intends to avail itself of these legal processes."
Bambu Lab further states that infringement claims made by Stratasys relating to US Patent No. 9592660 and US Patent No. 8562324 were found to be invalid by the PTAB. A Director Review sought by Stratasys on the latter verdict has been rejected but the appeal window remains open, while Stratasys decided not to appeal the former and that invalidation is now final.
The Chinese 3D printer manufacturer also wished to stress that, in relation to the broader legal dispute between the two companies, the European Unified Patent Court (UPC) The Hague Local Division dismissed Stratasys' preliminary injunction application against Bambu Lab on April 24, 2026, holding that it does not infringe the European counterpart patent (EP2964450, which is part of the same patent family as US 9421713, per Bambu). Bambu says Stratasys did not appeal the decision, but Bambu has initiated invalidation proceedings against this European counterpart patent.
Regarding the core purge tower patent involved in the recent trial (Patent No. 9421713), the PTAB previously upheld its validity, but Bambu Lab has appealed to the US Court of Appeals for the Federal Circuit (CAFC), and proceedings are ongoing.
Stratasys vs. Bambu Lab: A view from Europe
Julian Asquith, European patent attorney and Partner of Marks & Clerk discusses the features of Stratasys' patent infringement lawsuit against Bambu Lab.
