US Patent Issued to NTT on Sept. 15 for "Acoustic signal output device" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,739,559, issued on Sept. 15, was assigned to NTT Inc. (Tokyo).

"Acoustic signal output device" was invented by Hironobu Chiba (Tokyo), Tatsuya Kako (Tokyo) and Kazunori Kobayashi (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an acoustic signal output device including a first driver unit that emits a first acoustic signal to one side and emits a second acoustic signal to another side, a second driver unit that emits a fourth acoustic signal to one side and emits a third acoustic signal to another side, a first housing portion provided with a first sound hole for leading out the first acoustic signal to an outside and a second sound h...