STEWART, District Judge.
Plaintiff brought this action primarily seeking a declaratory judgment to the effect that United States Letters Patent Nos. 2,411,180 and 2,417,538 are invalid and that they are not infringed by certain processes used by plaintiff. Defendants filed an answer to the complaint and defendant Blaw-Knox asserted a counterclaim against plaintiff for royalties under a license agreement allegedly covering these patents. Subsequently, defendants filed...
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