ALEXANDRIA, Virginia, July 4 -- SIGMA ADDITIVE SOLUTIONS, INC., Santa Fe, New Mexico has been assigned a patent (No. US 11692876 B2, initially filed July 9, 2021) developed by five inventors Vivek R. Dave, Concord, New Hampshire; Mark J. Cola, Santa Fe, New Mexico; R. Bruce Madigan, Butte, Montana; Martin S. Piltch, Los Alamos, New Mexico; and Alberto Castro, Santa Fe, New Mexico, for "Optical manufacturing process sensing and status indication system."  more