ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,944, issued on Oct. 14, was assigned to DISCO Corp. (Tokyo).
"Grinding apparatus" was invented by Jiro Genozono (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A grinding apparatus has a grinding wheel fastened to a mount disk connected a spindle by a plurality of bolts. The mount disk has at least three threaded holes and a plurality of protrusions protruding from a mount surface thereof. Each of the bolts includes an externally threaded shank, a neck coupled to the externally threaded shank, and an engaging flange coupled to the neck and extending radially outwardly. The grinding wheel includes an annular open hole defined in a mating surfac...