• All sections
• F - Mechanical engineeringlightingheatingweaponsblasting
• F22D - Preheating, or accumulating preheated, feed-water for steam generationfeed-water supply for steam generationcontrolling water level for steam generationauxiliary devices for promoting water circulation within steam boilers
• F22D 5/20 - Controlling water feed or water levelAutomatic water feeding or water-level regulators for varying the speed or delivery pressure of feed pumps without floats

Patent holdings for IPC class F22D 5/20

Total number of patents in this class: 2

10-year publication summary

Principal owners for this class