Cannabix Technologies Granted U.S. Patent - Cannabis Drug Detection Device For immediate release. Vancouver, British Columbia, January 12, 2021: Cannabix Technologies Inc.(CSE: BLO, OTC PINK: BLOZF) (the “Company”) developer of the Cannabix Marijuana Breathalyzer devices for law enforcement and the workplace, announces that the United States Patent and Trademark Office (USPTO) has granted patent No. 14/689434 entitled, “Cannabis Drug Detection Device” to the Company.