ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,178, issued on May 20, was assigned to Archem Inc. (Tokyo).
"Cushion material and cushion material manufacturing method" was invented by Taichi Itabashi (Tokyo), Yukiko Yamaguchi (Tokyo), Satoshi Ienaga (Tokyo) and Yoshiyuki Takahashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cushion material with improved vibration absorptivity, and a cushion material manufacturing method for easily obtaining the cushion material are provided. The cushion material (1) includes a foam body (2) having a surface portion (20) formed of an air permeability control surface portion (21) and an air permeability uncontrol surface portion (22), and a covering m...