ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,794, issued on March 4, was assigned to SAAB AB (Linkoeping, Sweden).

"System and method for determining changes of an optical fibre" was invented by Roy Josefsson (Hoekerum, Sweden) and Daniel Eckerstrom (Bankeryd, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "Embodiments of the present invention relate to determining temperature, pressure, strain, or other changes of an optical fibre (250) having Fiber Bragg Grating (FBG) patterns provided in at least one portion (Portion 1) of said optical fibre (250), said optical fibre (250) being connected between a first detector arrangement (210) and a second detector arrangement (220)."

The patent ...