ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,814, issued on April 22, was assigned to MAKITA Corp. (Anjo, Japan).

"Lifter device" was invented by Syuji Aoyama (Anjo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A lifter device includes a pole, a lifting member guided by the pole, a motor that generates power used for ascending and descending of the lifting member, a controller that controls the motor, a case that is fixed to at least a portion of the pole and accommodates the motor and the controller, a transmission mechanism that transmits the power of the motor to the lifting member, and a battery mounting portion that is provided on the case and to which a battery pack is mouted to s...