ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,747,007, issued on Sept. 29, was assigned to Trosvik Oceantech AS (Brevik, Norway).

"Surface-cleaning device and vehicle" was invented by Robert Andersen (Notodden, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention concerns a cleaning device for cleaning a surface submerged in water, a cleaning system comprising a plurality of the cleaning devices, an underwater vehicle comprising the cleaning system and a method using the underwater vehicle.The cleaning device comprises a disk member rotatable around a rotational axis r, a disk housing covering the disk member, a spindle rotatably coupled to the disk member and a rotary motor providi...