Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Back flow preventing valve apparatus, with multiple check valves

Back flow preventing valve apparatus, with multiple check valves

US Patent 6386223 · Granted May 14, 2002

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Supply valve assembly for a hydrant2022
Supply assembly for use with multiple lines of a hydrant2021
Self-draining hydrant with piston assembly2020
Valve assembly for use with multiple liquid lines2020
Tubular plastic hydrant2015
Tubular plastic hydrant2014
Faucet sealing2013
Stopper elastomeric sleeve assembly into standard valve2012
Stopper sleeve assembly into standard valve2012
Valve in-line backflow control2011
Spool apparatus to connect to underground well pipe2010
Filtered and unfiltered water ducting in sink fitting2008