4. Fluid handling
  5. Systems
  6. Multi-way valve unit

David B. McDonald

Inventor

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Air valve

Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent

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Rotary air valve seal arrangement

Fluid handling – Systems – Multi-way valve unit
Patent

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Wet-grinding gypsum with polycarboxylates

Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1068378

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