• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F28F - Details of heat-exchange or heat-transfer apparatus, of general application
• F28F 1/12 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element

Patent holdings for IPC class F28F 1/12

Total number of patents in this class: 688

10-year publication summary

Principal owners for this class