HERNDON, Va.--(BUSINESS WIRE)--Guardian Technologies International, Inc. (OTCBB:GDTI), a leading technology developer of intelligent imaging informatics solutions, for the homeland security and healthcare industries, has submitted a $3 million research and development proposal request to the U.S. Government for grant funding to expand the current capabilities of Signature Mapping™ and to engage in a customization initiative of its Signature Mapping™ technology for battlefield applications.