4. Automatic temperature and humidity regulation
  5. Mixing fluid of dissimilar temperature
  6. Having oscillating or reciprocating valve

Watts Investment Company

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Automatic water shut-off valve

Fluid handling – Processes – Cleaning – repairing – or assembling
Patent

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Backflow preventer and test cock assembly

Fluid handling – Processes – Involving pressure control
Patent

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Backflow preventer assembly

Fluid handling – Back flow prevention by vacuum breaking – Air vent in liquid flow line
Reexamination Certificate

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Backflow preventer assembly

Fluid handling – With casing – support – protector or static constructional... – Jacketed
Patent

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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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