ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,513,456, issued on Dec. 30, was assigned to NTT Inc. (Tokyo).
"Sound system" was invented by Masahiro Fukui (Tokyo), Kazunori Kobayashi (Tokyo), Noriyoshi Kamado (Tokyo) and Ryotaro Sato (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided an acoustic system for a user who uses a seat of an airplane, an automobile, or the like, which reproduces a sound that cannot be heard by surrounding users without using earphones or headphones. An acoustic system including a speaker system including one speaker unit that emits a sound based on an acoustic signal of a predetermined sound source, in which a sound emitted from the speaker unit is hea...