Inventor

HENGEL RAYMOND J

US3 patents

Patents

3 patents

US9611980B2Apr 4, 2017

Check valve

ROYS CURTIS9 citations80

US10190726B2Jan 29, 2019

Check valve

ROYS CURTIS1 citations69

US10677389B2Jun 9, 2020

Check valve

ROYS CURTIS0 citations48