• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F01D - Non-positive-displacement machines or engines, e.g. steam turbines
• F01D 11/04 - Preventing or minimising internal leakage of working fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam

Patent holdings for IPC class F01D 11/04

Total number of patents in this class: 329

10-year publication summary

Principal owners for this class