ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,898, issued on March 31, was assigned to Zipline International Inc. (South San Francisco, Calif.).

"Steerable dependent vehicle for unmanned aerial vehicles" was invented by Keenan A. Wyrobek (South San Francisco, Calif.), Brendan D. Wade (South San Francisco, Calif.), Tristan Semmelhack (South San Francisco, Calif.), Devin Williams (South San Francisco, Calif.), Gregoire Vandenbussche (South San Francisco, Calif.), Rajan Gill (South San Francisco, Calif.) and Brian Boomgaard (South San Francisco, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A delivery device to deliver a product from an aerial location includes a body defining a payload h...