ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,461,351, issued on Nov. 4, was assigned to CANON K.K. (Tokyo).
"Zoom lens and image pickup apparatus" was invented by Akihiko Yuki (Saitama, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A zoom lens includes, in order from an object side to an image side, a first lens unit that has a positive refractive power and does not move for zooming, a second lens unit that has a negative refractive power and moves in zooming, at least two lens units that move in zooming, and a final lens unit that has a positive refractive power, is disposed closest to the image side, and does not move for zooming. The first lens unit includes, in order from the object side...