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Brulotte'S Web, Herbert J. Hovenkamp

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Kimble v. Marvel Entertainment held that stare decisis required the Supreme Court to adhere to the half century old, much criticized rule in Brulotte v. Thys. Justice Douglas' Brulotte opinion concluded that license agreements requiring royalties measured by use of a patent after its expiration are unenforceable per se. The court need not inquire into market power nor anticompetitive effects, effects on innovation, and it may not accept any defense. Congress can change the rule if it wants to, but has resisted many invitations to do so.

Under Brulotte a hybrid license on patents and trade secrets requires a royalty …