MEMORANDUM OPINION
RALPH M. FREEMAN, Senior District Judge.
This is a motion for partial summary judgment brought by defendant Fargo Machine & Tool Company. The primary issue on this motion is the validity of Pettibone's reissue patent # 28,659.
Facts
The Beardsley & Piper Division of Plaintiff Pettibone has been producing and selling mixing-mulling machines to the foundry industry for the preparation of molding sands used...
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