4. Metal working
  5. Method of mechanical manufacture
  6. Gas and water specific plumbing component making

Lester Engelmann

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Backflow prevention assembly

Fluid handling – Systems – Flow path with serial valves and/or closures
Reexamination Certificate

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Backflow prevention assembly

Fluid handling – Processes – Cleaning – repairing – or assembling
Reexamination Certificate

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Backflow prevention assembly

Metal working – Method of mechanical manufacture – Gas and water specific plumbing component making
Reexamination Certificate

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Testing valve assemblies

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2071000

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