CARLSBAD, Calif., Jan. 23, 2019 (GLOBE NEWSWIRE) — Aurora Spine Corporation (TSXV: ASG) announced today the issuance by the United States Patent and Trademark Office (USPTO) of United States Patent No. 10,143,501 entitled “Expendable Interspinous Device”.  This new patent relates to Aurora’s family of minimally invasive spinal implants, bolstering the patents already issued to Aurora …