ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,548,543, issued on Feb. 10, was assigned to Novio Sound B.V. (Enschede, Netherlands).

"Active sound-cancellation system for an open fluid-duct" was invented by Arthur Perry Berkhoff (Enschede, Netherlands) and David George Bradford (Enschede, Netherlands).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention is in the field of an active sound-cancellation system, an open fluid-duct comprising such an active sound-cancellation system, such as an air duct, and an active sound-cancellation computer program comprising instructions for operating such an active sound-cancellation system. The active sound-cancellation system reduces noise signifi...