• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F28F - Details of heat-exchange or heat-transfer apparatus, of general application
• F28F 1/28 - 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 and extending transversely the means being integral with the element the element being built-up from finned sections

Patent holdings for IPC class F28F 1/28

Total number of patents in this class: 39

10-year publication summary

Principal owners for this class