ALEXANDRIA, Va., June 10 -- United States Patent no. 12,292,521, issued on May 6, was assigned to DETNET SOUTH AFRICA (PTY) LTD (Johannesburg).
"Detonator position determination" was invented by Craig Schlenter (Johannesburg) and Marinus Yates (Benoni, South Africa).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a blasting system a method of determining which borehole in a plurality of boreholes at a blast site is closest to a tagger, wherein latitude and longitude coordinate values for each borehole are determined and by using subsets of the longitude coordinates and latitude coordinates, and by performing a haversine calculation the position of the borehole which is closest to the tagger is determined."...