Inventor
WALDEN DAVID MICHAEL
US3 patents
Patents
3 patentsUS7240688B2Jul 10, 2007
Retrofitting a fire hydrant with secondary valve
DAVIDSON HYDRANT TECHNOLOGIES21 citations86
US7775231B2Aug 17, 2010
Retrofitting a fire hydrant with a replacement hydrant body containing a secondary valve
DAVIDSON HYDRANT TECHNOLOGIES5 citations58
US7575017B2Aug 18, 2009
Wet barrel fire hydrant system with second valve
DAVIDSON HYDRANT TECHNOLOGIES4 citations55