• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F28D - Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contactheat storage plants or apparatus in general
• F28D 15/04 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls in which the medium condenses and evaporates, e.g. heat-pipes with tubes having a capillary structure

Patent holdings for IPC class F28D 15/04

Total number of patents in this class: 1608

10-year publication summary

Principal owners for this class