ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,481,120, issued on Nov. 25, was assigned to CANON K.K. (Tokyo).
"Optical apparatus and image pickup apparatus having the same" was invented by Toshihiro Okuda (Tochigi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An interchangeable lens comprises a first to a third guide units, and a rear unit base. Each of the first to third guide units includes a pair of guide members including one member and the other member, there are three regions divided in a circumferential direction around the optical axis, a region in which one member of the first guide unit is disposed is defined to as a first region, a region in which one member of the second guide u...