Inventor
HEIDERMAN DOUGLAS CHARLES
US3 patents
Patents
3 patentsUS7708028B2May 4, 2010
Fail-safe vacuum actuated valve for high pressure delivery systems
PRAXAIR TECHNOLOGY INC39 citations87
US6959724B2Nov 1, 2005
Multiple regulator vacuum delivery valve assembly
PRAXAIR TECHNOLOGY INC27 citations87
US7390346B2Jun 24, 2008
System and apparatus for producing primary standard gas mixtures
PRAXAIR TECHNOLOGY INC1 citations48