Court of Appeals for the Seventh Circuit February 13, 1975, 74--1078 (Arvin Industries, Inc. v. Berns Air King Corporation)

*1072

TONE, Circuit Judge.

The single question we reach in this opinion is whether there is federal jurisdiction under 28 U.S.C. § 1338(a) over an action by a patent licensor against his licensee for infringement, when the license agreement is shown by the complaint to be in effect and the wrongful conduct alleged is refusal to pay royalties.