Assignee
PERROTT C H INC
US·6 granted patents·250 citations·filing 1987–1996
Top patents by PatentIndex Score
6 records- 0193US5253670AMultiple drain trap primer valve assembly for sewer linesPERROTT C H INC·Filed 1992·Granted Oct 19, 1993·105 cites·6 claims
- 0292US4712574AVacuum-breaking valve for pressurized fluid linesPERROTT C H INC·Filed 1987·Granted Dec 15, 1987·71 cites·5 claims
- 0374US4926897AAutomatic fluid pressure equalizing valvePERROTT C H INC·Filed 1989·Granted May 22, 1990·30 cites·3 claims
- 0454US5263508ASewer line water trap charging valve with improved adjustment for house line pressure changesPERROTT C H INC·Filed 1993·Granted Nov 23, 1993·22 cites·8 claims
- 0540US5797419ASewer line trap priming assembly and antisiphoning conduit component thereforPERROTT C H INC·Filed 1996·Granted Aug 25, 1998·10 cites·8 claims
- 0637US5678588ASewer line multiple trap priming system and methodPERROTT C H INC·Filed 1996·Granted Oct 21, 1997·12 cites·7 claims
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