Mealey's (April 7, 2023, 3:05 PM EDT) -- CORPUS CHRISTI, Texas — A company that makes equipment for use in hydraulic fracturing operations has filed an amended complaint in Texas federal court against two men the company contends have stolen royalty payments by falsely representing that they were co-inventors of certain patents. In the amended complaint the company adds claims for a declaration of “a reasonable royalty” and a declaration of patent invalidity....