U.S. federal trademark · Serial No. 98664517
These are ballistic blocks made to look like Concrete Masonry Units (CMUs), and that uses Portland Cement as part of the mixture; however through additives, the product is changed into a material capable of stopping ballistic projectiles. It has been tested and patented.
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.