LASKER, District Judge.
Mine Safety Appliances Company and its subsidiary Catalyst Research Corporation ("Mine Safety") commenced this action seeking a declaratory judgment that patents held by defendant Becton Dickinson and Company are invalid or are not infringed by certain gas detectors (known as "MiniCo I, II, III, and IV") manufactured by Mine Safety. Becton Dickinson ("BD") counterclaimed, alleging infringement by Mine Safety. The parties have resolved all issues...
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