ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,334, issued on Jan. 13, was assigned to Torqeedo GmbH (Wessling, Germany).
"Boat drive" was invented by Anton Spengler (Wessling, Germany), Johannes Heller (Wessling, Germany) and Frank Despineux (Wessling, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A boat drive is provided for driving a water vehicle. The boat drive includes a drive housing made from a first metallic material and a propeller shaft made from a second metallic material. Moreover, the propeller shaft is designed to receive a drive propeller and the propeller shaft is mounted in the drive housing. In addition, a propeller shaft isolator is provided to electrically isolate t...