On 2 July 2019 the Patent Office of the Republic of Poland has granted a patent No. P.417132 for the invention of “Low temperature head for stabilization of temperatures below 4.2K in liquid helium systems” to the Institute of Molecular Physics of the Polish Academy of Sciences, Wroclaw University of Technology and Polish Mining and Gas Extraction Company PGNiG. The use of a capillary head with increased flow resistance allows for cooling and stabilization of a large volume of liquid helium with optimal, low consumption of this liquid, and preservation or increase of the helium He3 isotope concentration in He4 helium to the lowest temperatures.