ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,202, issued on May 19, was assigned to PRATT & WHITNEY CANADA CORP. (Longueuil, Canada).
"Fastening system" was invented by Milos Ivankovic (Toronto), Gerard Theriault (Longueuil, Canada) and Robert Venditti (Woodbridge, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fastening system for an aircraft includes first and second parts of the aircraft, a bolt hole including a bolt countersink and being defined by a bolt hole surface of the first part, a nut hole including a nut countersink and being defined by a nut hole surface of the second part, a bolt having a shank including threads, and a bolt head with an undersurface complementarily shape...