ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,833, issued on Jan. 13, was assigned to Renishaw PLC (Wotton-Under-Edge, Great Britain).

"Tool measurement apparatus for a machine tool" was invented by William David Stockill (Wotton-under-Edge, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tool measurement apparatus for a machine tool includes a transmitter portion including a light source for generating a light beam and a receiver portion including a detector for detecting the light beam, the light beam being passed from the light source to the detector along an optical path. At least one of the receiver portion and the transmitter portion includes a protection device including a...