ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,516, issued on March 31, was assigned to YAMABIKO Corp. (Japan).

"Working machine" was invented by Atsushi Nishimura (Ohme, Japan), Shunsuke Ueda (Ohme, Japan) and Mindaugas Ambrasas (Ohme, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A working machine is provided that includes a working portion and a main body portion including a main body case, an operation mechanism and a power switch. The operation mechanism includes a trigger lever, a lockout lever, and a restricting portion. The trigger lever includes a trigger lever body, and an operation portion including a projection portion. When an external force toward the main body case is appl...