ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,402, issued on May 5, was assigned to Leggett & Platt Canada Co. (Halifax, Canada).

"Pump assembly" was invented by Krzysztof Zulauf (Windsor, Canada), Maxime Samain (Harelbeke, Belgium), Eric Michalak (Canton, Mich.), Robert J. McMillen (Tecumseh, Canada), Wade O'Moore (Belle River, Canada), Horia Blendea (LaSalle, Canada), Paul Tindall (Harrow, Canada) and Stefano Nicola (Windsor, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A pump assembly includes a housing with an air inlet and an air outlet, a motor supported by the housing, the motor including a drive shaft rotatable about a drive shaft axis, a first plurality of diaphragms supported b...