Mealey's (December 11, 2017, 1:10 PM EST) -- SAN FRANCISCO — A California federal judge on Dec. 8, in denying summary judgment to Fitbit Inc. on class claims that the sleep-tracking functions on its devices do not work, ruled that the opinions of a plaintiffs’ expert who tested the devices are reliable and relevant (James Brickman, et al. v. Fitbit Inc., No. 3:15-cv-02077, N.D. Calif., 2017 U.S. Dist. LEXIS 202568)....