IC 011. US 013 021 023 031 034. G & S: Heat exchangers, heat generators, heat conductors, apparatus for transportation of heat by means of heat conductors and part of the apparatus
IC 040. US 100 103 106. G & S: Coating of surfaces, in particular of inside areas of hollow parts during manufacture of heat conductors
IC 042. US 100 101. G & S: Scientific and technological services and research and design relating there to in connection with providing or draining off heat or in connection with heat conductors
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