ALEXANDRIA, Va., Aug. 5 -- United States Patent no. D1,139,171, issued on Aug. 4, was assigned to DAB PUMPS S.P.A. (Mestrino, Italy).

"Variable speed controller" was invented by Fabio Bertolino (Mestrino, Italy).

The patent was filed on Nov. 1, 2024, under Application No. D/971,246.

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