Denis SimachevEventsDennis Simachev has patented camouflage umbrellas for protection…Recent coverageDenis Simachev patented camouflage umbrellas for protection against thermal imagers for Armed Forces of the Russian Federation — The InsiderDesigner Denis Simachev and the RAS Institute of Control Problems have filed a joint patent for the technology of "camouflage zones..." — Радио Свобода