ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,726,764, issued on Sept. 1, was assigned to GP ACOUSTICS (UK) Ltd. (Maidstone, Great Britain).
"Compression drivers" was invented by Mark Alexander Dodd (Budleigh Salterton, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A compression driver comprising a diaphragm having a concave sound-radiating surface, a phase plug having a convex surface shaped to match the concave surface of the diaphragm, and a magnet, the diaphragm being connected to a voice coil former along a line forming a closed loop, the diaphragm and former being adapted to reciprocate along an axis, the diaphragm, phase plug, voice coil former together being configured to for...