ALEXANDRIA, Va., June 19 -- United States Patent no. 12,335,684, issued on June 17, was assigned to Brane Audio LLC (Austin, Texas).
"Loudspeakers and methods of use thereof" was invented by Joseph F. Pinkerton (Austin, Texas), James A. Andrews (Austin, Texas) and David A. Badger (Lago Vista, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Electroacoustic drivers that can be utilized in loudspeaker systems that utilize drivers having a magnetic negative spring (MNS). The magnets of the MNS can be arranged for radial stability and/or to provide for linear magnetic forces. A variable reluctance device can be used to vary the resonant frequency of electroacoustic driver in response to a feedback signal."
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