OPINION
LATCHUM, District Judge.
Kewanee Oil Company ("Kewanee") has brought this action against M & T Chemicals, Inc. ("M & T") seeking a declaratory judgment of invalidity and non-infringement of United States Patents Nos. 2,685,954 and 2,709,512. These patents, owned by M & T, relate to automatic processing apparatus for subjecting a series of different metal parts to selectively differing electro-chemical treatments in a sequence of processing...
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