US Patent Issued to Ravin Crossbows on March 18 for "Pulley projectile launcher" (Hawaii Inventor)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,328, issued on March 18, was assigned to Ravin Crossbows LLC (Superior, Wis.).

"Pulley projectile launcher" was invented by Paul Trpkovski (Kailua Kona, Hawaii).

According to the abstract* released by the U.S. Patent & Trademark Office: "A projectile launcher includes a frame and a projectile moves within a horizontal projectile plane and along the projectile axis. The projectile is fired from a front end of the frame. The projectile launcher includes a first power group at a first frame side. The first power group includes a plurality of first power group drawstring pulleys. At least one of the plurality of first power group drawstring pulleys is attached to the frame. The proj...