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Charles H. Perrott
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Portland, OR, US
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Patents Grants
last 30 patents
Information
Patent Grant
Water distribution apparatus for multiple sewer drain trap primer s...
Patent number
6,325,091
Issue date
Dec 4, 2001
Precision Plumbing Products, Inc.
Charles H. Perrott
E03 - WATER SUPPLY SEWERAGE
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
Ping-free water hammer arrester
Patent number
5,385,172
Issue date
Jan 31, 1995
Precision Plumbing Products, Inc.
Charles H. Perrott
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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
Information
Patent Grant
Floating seal valve assembly
Patent number
4,644,972
Issue date
Feb 24, 1987
Precision Plumbing Products, Inc.
Charles H. Perrott
E03 - WATER SUPPLY SEWERAGE