Patent 9327845 was granted and assigned to Google on May, 2016 by the United States Patent and Trademark Office.
An offshore airborne wind turbine system including an aerial vehicle, an electrically conductive tether having a first end secured to the aerial vehicle and a second end secured to a platform, a rotatable drum positioned on the platform, an aerial vehicle perch extending from the platform, wherein the platform is positioned on a top of a spar buoy.