A San Francisco judge has sanctioned a Texas IP firm and its client $222,000 for pursuing a patent infringement suit against Fitbit Inc. based on what he called ”implausible” and “impossible” theories.

U.S. District Judge Vince Chhabria held Friedman, Suder & Cooke jointly and severally liable with Quarterhill subsidiary Smart Wearable Technologies Inc. under Rule 11 and Section 285 of the Patent Act.