ALEXANDRIA, Va., July 3 -- United States Patent no. 12,346,128, issued on July 1, was assigned to Amazon Technologies Inc. (Seattle).

"Indoor altitude determination for aerial vehicles" was invented by Dan-Adrian Dutescu (Giroc, Romania).

According to the abstract* released by the U.S. Patent & Trademark Office: "An aerial vehicle equipped with a first range sensor oriented to capture range data above the aerial vehicle and a second range sensor oriented to capture range data below the aerial vehicle is programmed with global map of an indoor space, including an upper global map representing distance data for upper surfaces of the indoor space and a lower global map representing distance data for lower surfaces of the indoor space. An off...