RULING ON MOTION FOR SUMMARY JUDGMENT
DORSEY, District Judge.
In this suit for infringement of United States Patent No. 2,945,666 ("666") relating to the manufacture of ball valves, defendant has moved for summary judgment on the three issues: laches, estoppel and prejudgment interest.
Facts
The patent was issued to plaintiff on July 19, 1960. Since 1962, plaintiff has conducted a series...
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