What the jury decided

A federal jury in the Eastern District of Texas awarded Stratasys $27.6 million in September 2026 in the first patent trial against the Bambu Lab group. Trade reports say the jury found infringement of claims from several US patents and characterised the infringement as wilful. The dispute concerns the United States and specific patent claims; it is not a general prohibition on multicolour FDM or automatic bed levelling.

The $27.6 million figure is a jury verdict, not the irreversible end of the entire dispute. Post-trial motions, entry of final judgment, appeal and parallel patent-office proceedings can alter the practical outcome. At the time of the public reports, no order had been identified that automatically stopped US sales of the named printers.

Which technologies were disputed?

One central feature is the prime or purge tower used during single-nozzle multicolour printing. The separate tower stabilises flow and removes residual material after a colour or material change. The legal question was not whether anyone may use a purge tower, but whether identified Bambu Lab products practise relevant claims of US 9,421,713.

Another disputed area involves force-based detection of contact between nozzle and build platform. US 9,168,698 and US 10,556,381 describe arrangements using sensor signals to determine force between an extruder and the platform or part. The legal boundary depends on claim language, judicial construction and the product implementation; the short label 'strain-gauge bed levelling' hides that detail.

Why PTAB review is a separate matter

Bambu-related entities filed several inter partes reviews before the US Patent Trial and Appeal Board. An IPR does not decide whether a product infringes or how much damages should be paid. It asks whether challenged claims are patentable over the prior art presented. A district-court infringement verdict and a PTAB validity ruling can therefore concern the same patent while answering different questions.

Public PTAB records connected to the dispute include IPR2025-00531 for US 9,168,698 and IPR2025-00532 for US 10,556,381, alongside proceedings on other Stratasys patents. Status and claim outcomes differ by case, and review or appeal may follow decisions. Statements that 'PTAB erased the verdict' or that 'the jury finally confirmed validity' are therefore legally imprecise.

What it means for users

In the short term, the verdict does not itself change the operation, firmware or warranty of printers already purchased. A manufacturer could later choose a software design-around, hardware change, licence or legal remedy. Customer risk is therefore more likely to arise around US distribution, future feature changes and support than an overnight loss of machine function.

For competitors, the case is a design signal. Multi-nozzle or tool-changing systems can reduce reliance on purge towers; contact, optical, inductive and pressure-based levelling create different engineering and patent exposures. A different implementation is not automatically non-infringing: freedom-to-operate analysis is claim-specific and territorial.

Verified facts and open questions

The reported $27.6 million jury verdict, Bambu Lab's disagreement and the existence of multiple PTAB proceedings are documented. The patents disclose the technical subject matter. The full dispute is not concluded, and the effect of later court or PTAB steps can be assessed only from the specific orders.

Editorial conclusion

The stakes extend beyond $27.6 million: the case shows that apparently ordinary desktop-printer automation may intersect active patent claims. Yet collapsing separate proceedings into a simple winner–loser narrative is misleading. The accurate reading is that a significant jury verdict has been returned while validity review and legal remedies continue on separate tracks.

Sources

- Tom's Hardware, TCT Magazine and 3DPrint.com — reports on the September 2026 verdict. - Google Patents — US 9,421,713; US 9,168,698; US 10,556,381. - USPTO PTAB — public P-TACTS and PTAB Decisions records.