ALEXANDRIA, Va., Sept. 3 -- United States Patent no. 12,403,999, issued on Sept. 2, was assigned to ZF Friedrichshafen AG (Friedrichshafen, Germany) and ZF MARINE PROPULSION SYSTEMS MIRAMAR LLC (Miramar, Fla.).

"Marine propulsion system supported by a strut" was invented by Andrew Orvieto (Plantation, Fla.), Keith Stanley (Coral Springs, Fla.), Dave Gruenwald (Oshkosh, Wis.) and Bryan Danner (Oshkosh, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A marine propulsion system, supported by a strut, which comprises an inner propeller shaft supporting a first propeller adjacent a trailing end thereof, and the inner propeller shaft is connected to the drive shaft for receiving and supplying a first portion o...