ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,117, issued on March 25, was assigned to KONINKLIJKE PHILIPS N.V. (Eindhoven, Netherlands).
"Flexible spring and motor assembly" was invented by Dave Ahlman (Bothell, Wash.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A personal care appliance which includes at least one flexible spring. The flexible spring having an grounded section with an outer surface and an inner surface, a rotational member arranged radially within the grounded section, wherein the rotational member is arranged to rotate within the grounded section in a first rotational direction about an imaginary rotational axis, and a compliant member having a first end and a second end,...