ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,406, issued on March 24, was assigned to Ideon Technologies Inc. (Richmond, Canada).

"System and method for imaging subsurface density using cosmic ray muons" was invented by Douglas William Schouten (Surrey, Canada) and Benjamin Christopher Barbour (Vancouver, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A longitudinally extending detector drill rod is connectable at each of its longitudinal ends to another drill rod in a drill string and is deployable, as part of the drill string, to a location below a surface of the earth for detecting cosmic ray muons that penetrate the surface of the earth. The detector drill rod comprises: a drill ro...