OPINION
ROTH, District Judge.
This declaratory judgment action was brought by United Sweetener, USA, Inc. ("United Sweetener") and Holland Sweetener Co., Vof ("Holland Sweetener"), seeking among other relief a declaration of the invalidity of two patents for sweetening compositions, U.S. Patent No. 3,492,131 ("the '131 patent") and U.S. Patent No. 3,780,189 ("the '189 patent"). These two patents are the property of the defendant, Nutrasweet Co.
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