FAIRCHILD, Circuit Judge.
The University of Illinois Foundation brought action against Blonder-Tongue Laboratories, Inc. for infringement of two patents in the field of radio and television antennas. Blonder-Tongue asserted invalidity of the two patents. JFD Electronics Corporation, licensed under the patents, was made a party, and Blonder-Tongue counterclaimed against JFD (principally) and the Foundation,
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