ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,968, issued on April 29, was assigned to MILWAUKEE ELECTRIC TOOL Corp. (Brookfield, Wis.).

"System including recovery pump and vacuum pump" was invented by Alex H. Boll (Milwaukee), Aaron C. Grode (Germantown, Wis.), Ryan J. Denissen (Sussex, Wis.) and Justin Miller (Milwaukee).

According to the abstract* released by the U.S. Patent & Trademark Office: "A system attachable to a refrigeration circuit includes a recovery pump attachable to the refrigeration circuit to remove refrigerant. The recovery pump includes a pump, an electric motor, a battery pack, and a recovery pump controller for controlling the operation of the electric motor. The recovery pump controller has a first com...