Zurn Industries, Inc. (“Zurn”) moved to exclude Sloan Valve Company’s (“Sloan”) consultant witness and other testimony based on the consultant’s investigation. The patent-at-issue, U.S. Patent No. 7,607,635, entitled “Flush Valve Handle Assembly Providing Dual Mode Operation” (the “‘635 Patent”), pertains “to flush valves for use with plumbing fixtures such as toilets, and more specifically to improvements in the bushing of the actuating handle assembly that will provide for user-selectable, dual mode operation of the flush valve.” As explained by the district court, the improvement is a mechanism that allows a user to select one of two flush volumes based on the direction of actuation of the handle: a full flush volume to evacuate solid waste from the bowl or a reduced flush volume to remove liquid waste.
The district court explained that Sloan hired Leone Flosi of Quest Consultants Int’l Ltd. (“Quest”) to perform an investigation of bathrooms containing either Sloan or Zurn manual dual flush valves and handles at Sloan’s damage expert, Mr. Bero’s, direction. Specifically, Sloan hired Mr. Flosi and Quest to “assist in estimating the ratio of collateral product sales relative to manual dual-flush flushometer valves.” Mr. Bero used this data to project and calculate the profits that Sloan allegedly lost on collateral sales of unpatented products.
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