• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F28D - Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact; heat storage plants or apparatus in general
• F28D 7/02 - Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled

Patent holdings for IPC class F28D 7/02

Total number of patents in this class: 632

10-year publication summary

Principal owners for this class