ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,854, issued on Jan. 13, was assigned to CANON K.K. (Tokyo).
"Zoom lens and image pickup apparatus having the same" was invented by Shinya Okuoka (Tochigi, Japan) and Makoto Nakahara (Tochigi, 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 having negative refractive power, a second lens unit having positive refractive power, and a rear unit including one or more lens units. A distance between adjacent lens units changes during zooming. The rear unit includes a focus lens unit having positive refractive power and configured to move from the image side to the o...