The U.S. Supreme Court’s ruling Monday cutting off royalties for the developer of a Spider-Man toy may be a boon to the patent bar, but a blow to “garage inventors” who don’t know the intricacies of patent licensing agreements.

By a 6-3 vote, the court in Kimble v. Marvel Entertainment ruled that the inventor of a Spider-Man web-shooting toy is not entitled to royalties for use of the patent after it expired.