ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,549,899, issued on Feb. 10, was assigned to DENSO ELECTRONICS Corp. (Anjo, Japan) and TOYOTA JIDOSHA K.K. (Toyota, Japan).

"Notification sound generation device" was invented by Chikara Yamamoto (Anjo, Japan) and Tadashi Matsui (Toyota, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A notification sound generation device includes a speaker, a controller, a resistor, and a correction unit. The speaker is configured to generate a notification sound to surroundings of a vehicle. The controller is configured to output a sound signal that causes the speaker to generate the notification sound. The resistor has a resistance value corresponding to a corre...