ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,420,385, issued on Sept. 23, was assigned to MAKITA Corp. (Anjo, Japan).
"Screwdriver" was invented by Takeshi Kamiya (Anjo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A screwdriver allows a screwing operation and an unscrewing operation to be performed smoothly. A screwdriver includes a housing, a motor including a stator and a rotor, a spindle, a clutch assembly, and a spindle locking assembly. The spindle includes a rod to which a tip tool is attachable, and is supported by the housing in a manner movable between an advanced position and a retracted position in a front-rear direction. The spindle has a reception hole extending frontward fr...