ALEXANDRIA, Va., March 5 -- United States Patent no. 12,240,055, issued on March 4, was assigned to VulcanForms Inc. (Burlington, Mass.).

"Optical zoom in additive manufacturing" was invented by Michael von Dadelszen (Merrimack, N.H.), Raghav Aggarwal (Somerville, Mass.) and Hongqing Sun (Belmont, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Optics assemblies and their methods of use in additive manufacturing systems are described. In some embodiments, an additive manufacturing system may include a build surface, a plurality of laser energy sources configured to produce a plurality of laser spots on the build surface, and an optics assembly configured to independently control a size of each of the pl...