4. Fluid handling
  5. Self-proportioning or correlating systems
  6. Self-controlled branched flow systems

Robert G. Perkins

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Gray water reclamation system and method for providing and...

Fluid handling – Processes – With control of flow by a condition or characteristic of a...
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Systems and methods for collecting and distributing gray water

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Reexamination Certificate

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