"The device of development of concentrations of eternal life PRK-1UM three-mode" refers to the modification of the "Device of development of concentrations of eternal life PRK-1U three-mode", which is written in abbreviated form in the letter "M" (Modified). Therefore, it is also protected by the
patent for invention issued to Grigori Grabovoi by the US Patent and Trademark Office on November 19, 2024 with priority from July 9, 2018, since this patent simultaneously with the protection of the PRK-1U, protects in accordance with the description of the patent, also the modifications of the PRK-1U.