ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,554, issued on June 3, was assigned to Geosource Energy Inc. (Caledonia, Canada).

"Method and apparatus for installing geothermal heat exchanger" was invented by Stanley Reitsma (Caledonia, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "A borehole is bored to a borehole target depth in a site and a geothermal heat exchanger is inserted into and then secured in the borehole at the desired depth. Once the heat exchanger has been secured in the borehole, the heat exchanger has a closed distal end and an open proximal end and has at least one fluid path between the closed distal end and the open proximal end, with installation fluid disposed in th...