Inventor
JOHNSTON GREGORY L
US14 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSTON GREGORY L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
WESTINGHOUSE AIR BRAKE CO
11 patentsUS6009902AJan 4, 2000
Dual valve fitting for enabling quick measurement of pressure
WESTINGHOUSE AIR BRAKE CO89 citations97
US5503011AApr 2, 1996
Test connector for automatic test device
WESTINGHOUSE AIR BRAKE CO13 citations74
US6089268AJul 18, 2000
Dual valve fitting for enabling quick measurement of pressure
WESTINGHOUSE AIR BRAKE CO6 citations73
US6070854AJun 6, 2000
Dual valve fitting for enabling quick measurement of pressure
WESTINGHOUSE AIR BRAKE CO7 citations73
US5869754AFeb 9, 1999
Dual seal coupling apparatus for enabling quick measurement of brake cylinder pressure
WESTINGHOUSE AIR BRAKE CO15 citations73
US6164312ADec 26, 2000
Purge valve
WESTINGHOUSE AIR BRAKE CO10 citations71
US5952566ASep 14, 1999
Dual valve apparatus for enabling quick measurement of pressure
WESTINGHOUSE AIR BRAKE CO7 citations71
US5869765AFeb 9, 1999
Dual seal fitting for enabling quick measurement of brake cylinder pressure
WESTINGHOUSE AIR BRAKE CO11 citations71
US6029700AFeb 29, 2000
Dual valve fitting for enabling quick measurement of pressure
WESTINGHOUSE AIR BRAKE CO2 citations62
US5518304AMay 21, 1996
Filter arrangement and mounting in railway brake pipe bracket
WESTINGHOUSE AIR BRAKE CO3 citations61
US6170511B1Jan 9, 2001
Normally open purge valve
WESTINGHOUSE AIR BRAKE CO4 citations60