ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,988, issued on March 4, was assigned to SHENZHEN SHOKZ Co. LTD. (Shenzhen, China).
"Sound amplification device" was invented by Liwei Wang (Shenzhen, China) and Fengyun Liao (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is directed to a sound amplification device. The sound amplification device comprises a vibrating body, the vibrating body including at least one first vibration surface and at least one contact region for contacting with a vibration source. The vibration source detachably contacts with a contact region, an area of a first vibration surface is larger than an area of the contact region, the vib...