ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,704,359, issued on Aug. 11.
"Plastic cartridge case for artillery shot" was invented by Stancho Petkov Petkov (Sofia, Bulgaria) and Dobrin Ivanov Ivanov (Sofia, Bulgaria).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to ammunition, in particular to the construction of composite artillery cartridge cases and can find wide application in the production of general cartridge cases with plastic main body for artillery shots with split-cartridges and unitary loading. The abovementioned cartridge case contain a metal bottom and a plastic body fixed to it, centrally in the metal bottom is made a cylindrically shaped protrusion in which a s...