SAN FRANCISCO — After being sued three times in separate venues by rival fitness tracker maker Jawbone this summer, Fitbit Inc. has struck back.

In a complaint filed Tuesday in U.S. District Court for the Northern District of California by the company’s lawyers at Gibson, Dunn & Crutcher, Fitbit accused Jawbone of infringing three patents for technology that pairs wireless devices. The accused Jawbone products include the UP Move, UP2, UP3 and UP4, as well as the UP App software. The Northern District suit comes less than a week after Fitbit filed a separate suit in the District of Delaware accusing many of the same Jawbone devices of infringing three separate Fitbit patents.

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