Plaintiff Kenneth Butler, Sr. sued Defendants Balkamp Inc., National Automotive Parts Association, Genuine Parts Company Corporation, Tien-I Industrial Corporation, Limited, and Yuh Yeou Industry Co., Ltd. for infringement of U.S. Design Patent No. D500,646 (“the ’646 Patent”), entitled “Tool Handle.” The tool handle design of the ’646 Patent is intended for use with socket wrenches.
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