ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,513,399, issued on Dec. 30, was assigned to CARL ZEISS MEDITEC AG (Jena, Germany).

"Method for changing a total magnification of an optical observation apparatus, control device for an optical observation apparatus, and optical observation apparatus" was invented by Stephan Dreyer (Aalen, Germany) and Thomas Lang (Oberhaching, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method, a control device for carrying out the method, and an optical observation apparatus having the control device are provided. The optical observation apparatus comprises an imaging optical unit for generating at least one optical image of the observation object, at leas...