OPINION
CEDARBAUM, District Judge.
Jack Frost Laboratories, Inc. sues Physicians & Nurses Manufacturing Corporation ("P & N") for infringement of Jack Frost's patents on microwavable gel packs. From July 24, 1995 to July 27, 1995, I held a separate bench trial pursuant to Fed.R.Civ.P. 42(b) of defendant's affirmative defenses that Jack Frost's patents are invalid because the invention covered by the patents was placed on sale more than one...
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