ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,875, issued on April 22, was assigned to The Secretary of State for Defence (Salisbury, Great Britain).

"Projectile launch apparatus for use in fluid environments" was invented by Peter Richard Rushforth (Salisbury, Great Britain) and David Timothy Newell (Salisbury, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Projectile launch apparatus (20) for use in a fluid environment. The apparatus (20) comprises a launch tube (21) having a supercavitating projectile (24) with cavitator (29) received within the launch tube (21). A means for generating expulsion gas (not visible) is arranged to provide expulsion gas to propel the projectile (24)...