Tesla, SpaceX and xAI have gone to the U.S. District Court for the Western District of Texas to be told they are allowed to call something Terafab. The filing, made in mid-September 2026, is a declaratory judgment action — the companies are not claiming damages, they are asking a judge to confirm in advance that the name does not infringe anyone's trademark.
The anyone in question is TERA-print LLC, a firm in Skokie, Illinois that makes desktop photolithography printers for laboratory researchers working on sensors and bioengineering. It sells its instruments under the name Tera-Fab, a mark it registered years before Tesla filed anything.
How five months got here
| Date | What happened |
|---|---|
| 18 May 2026 | Tesla files three trademark applications for Terafab and Tesla Terafab |
| 22 May 2026 | TERA-print applies to extend its existing Tera-Fab registration into semiconductor materials, chips and AI services |
| 23 May 2026 | TERA-print sends a cease and desist letter |
| 10 June 2026 | TERA-print threatens a federal suit alleging infringement, false designation and unfair competition |
| June–August 2026 | Six settlement meetings, all unsuccessful |
| September 2026 | Tesla, SpaceX and xAI file for declaratory judgment |
The sequence is the argument. TERA-print's expansion into semiconductor and AI categories was filed four days after Tesla's applications and one day before the cease and desist — which is the timing Musk's companies will point at. TERA-print will point at having held the Tera-Fab name first, and at a Defense Department semiconductor fabrication contract and a stake in an AI company built on its technology, which is its answer to the claim that a tabletop printer and a chip fab are different businesses.
That claim is the plaintiffs' core defence: no ordinary buyer, they argue, would confuse a laboratory instrument with a semiconductor complex.
Why a name fight matters to a Tesla owner
Terafab is not a side project. As described in the filing it is a roughly $16.8 billion semiconductor complex spanning about 100 million square feet in Grimes County, Texas — the first phase of a build-out reported at up to $119 billion across thousands of acres near the Gibbons Creek Reservoir. What it is meant to produce is the point: AI chips for Tesla's in-car computing and Optimus, and for SpaceX's orbital data centre plans.
That is the same silicon supply question behind Tesla's AI5 chip entering trial production at Samsung's Texas fab. Tesla currently buys its inference hardware from foundries it does not own. Terafab is the proposal to stop doing that, and the capability it would bring in-house is the one that determines how fast FSD can improve in the cars people are driving now.
The other Terafab lawsuit
This is the second piece of litigation the project has generated, and the first was less flattering. SpaceX has separately sued Grimes County and the state of Texas to stop them releasing public records about the tax breaks granted for the $16.8 billion first phase.
A company suing to keep a name and suing to keep the terms of its subsidies secret in the same season is a reasonable summary of how Terafab is being built: fast, in Texas, and with as little disclosed as the law permits. None of it reaches a European road, but the chips do.