ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,301, issued on June 2, was assigned to ZODIAC POOL CARE EUROPE (Belberaud, France).

"Drive controls principally for automatic swimming pool cleaners" was invented by Florent Dallet (Ramonville-Saint-Agne, France) and Simon Duffaut (Castelginest, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and methods for counteracting, e.g., drift of automatic swimming pool cleaners are detailed. In particular, a drifting cleaner may recover its movement by altering traction speed of the motive element(s) on one side of its body. Such alteration may occur when the cleaner is travelling along a generally horizontally-oriented pool bottom, climbing ...