ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,974, issued on Dec. 16, was assigned to RTX Corp. (Farmington, Conn.).

"Cost-effective solid-state deposition of functionally graded titanium hollow fan blade sheath for improved galvanic corrosion resistance" was invented by Tahany El-Wardany (Vernon, Conn.), Sonia Martinez (Port Saint Lucie, Fla.) and Benjamin Bedard (Manchester, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An airfoil includes an airfoil body and a sheath. The airfoil body includes a first metallic material and the sheath includes a second metallic material. An interface connects the sheath to the airfoil body such that the sheath covers a forward edge of the airfoil body ...