ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,610, issued on April 7, was assigned to EGUN Co. LTD. (Gwangju-si, South Korea).
"Four-hole core drilling machine" was invented by Chae Mun Lee (Seongnam-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A four-hole core drilling machine of the invention includes a vertically reciprocating carriage mounted to a body, a motor coupled to the carriage, a fixing plate coupled to the carriage, to rotatably support a drive shaft of the motor, a pivoting plate fastened to the fixing plate under the condition that a pivot angle of the pivoting plate is changed, a drive pulley coupled to the drive shaft, to be rotatable by the drive shaft, four ...