Dallas-Fort Worth ranked No. 11 for patents out of 250 metros. Patents granted include: IBM's continuous health care plan coordination between patient and patient care team, Luraco's portable and rechargeable drill system, Occidental Chemical Corporation's methods of making chlorinated hydrocarbons, Roka Sports' eyeglasses with interchangeable lenses, Tesla's power balancing in a multi-phase system, Texas Instruments' wireless power transmission with fractional timing resolution, Toyota's object detection system, and Verizon's radio access technology change reporting.