ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,190, issued on June 2, was assigned to MAKITA Corp. (Anjo, Japan).

"Grinding tool" was invented by Takahiro Kawakami (Anjo, Japan) and Yu Eto (Anjo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A grinding tool allows effective reduction of vibration while maintaining the compact product size. A grinding tool includes a motor housing accommodating a motor, a pair of housing halves screwed together across the motor housing and each including a screw boss extending through the motor housing, and an elastic member between the motor housing and each of the screw bosses in an axial direction of the screw bosses."

The patent was filed on July 28, 2...