ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,012, issued on Dec. 2, was assigned to PRIMAX ELECTRONICS LTD. (Taipei, Taiwan).
"Headphone device" was invented by Yung-Tai Pan (Taipei, Taiwan), Chun-Nan Su (Taipei, Taiwan), Chun-Che Wu (Taipei, Taiwan), Ming-Fu Kung (Taipei, Taiwan), Yao-Chung Hsieh (Taipei, Taiwan) and Jyun-Ci Chen (Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A headphone device includes a first earmuff assembly, a second earmuff assembly, an arc-shaped connecting strip and a clamping force adjustment mechanism. The arc-shaped connecting strip is connected with the first earmuff assembly and the second earmuff assembly. The clamping force adjustment mechanism in...