C. H. Perrott, Inc.

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Portland, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Sewer line trap priming assembly and antisiphoning conduit componen...
- Patent number 5,797,419
- Issue date Aug 25, 1998
- C. H. Perrott, Inc.
- Charles H. Perrott
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Sewer line multiple trap priming system and method
- Patent number 5,678,588
- Issue date Oct 21, 1997
- C. H. Perrott, Inc.
- Charles H. Perrott
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Sewer line water trap charging valve with improved adjustment for h...
- Patent number 5,263,508
- Issue date Nov 23, 1993
- C. H. Perrott, Inc.
- Charles H. Perrott
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Multiple drain trap primer valve assembly for sewer lines
- Patent number 5,253,670
- Issue date Oct 19, 1993
- C. H. Perrott, Inc.
- Charles H. Perrott
- E03 - WATER SUPPLY SEWERAGE
Information Patent Grant
Automatic fluid pressure equalizing valve
- Patent number 4,926,897
- Issue date May 22, 1990
- C. H. Perrott, Inc.
- Charles H. Perrott
- G05 - CONTROLLING REGULATING
Information Patent Grant
Vacuum-breaking valve for pressurized fluid lines
- Patent number 4,712,574
- Issue date Dec 15, 1987
- C. H. Perrott, Inc.
- Charles H. Perrott
- E03 - WATER SUPPLY SEWERAGE

Patents Applicationslast 30 patents

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