In separate complaints in Milwaukee Federal Court, Stroke Solutions claims Tacki-Mac Grips and Energy Grip violate its patent on a golf putter grip.
TG3 Electronics claims iKey Industrial Peripherals and Stacoswitch violate trademark on its "water-resistant keyboard with angular enclosure," in Milwaukee Federal Court.
Webzero claims Cliv VU Inc. dba Spamex violates patent on its system to forward email, in Los Angeles Federal Court.
Johnson Health Tech of Taiwan claims Spirit Fitness Products of Arizona violates patent on its "elliptical exercise machines," in Madison, Wisc., Federal Court.
Read the Top 8
Sign up for the Top 8, a roundup of the day's top stories delivered directly to your inbox Monday through Friday.