Inventor
GRISSOM GREGORY T
US3 patents
Patents
3 patentsUS9441956B2Sep 13, 2016
System and method for inspecting railroad ties
GEORGETOWN RAIL EQUIP CO53 citations92
US8958079B2Feb 17, 2015
System and method for inspecting railroad ties
GEORGETOWN RAIL EQUIP CO34 citations89
US11433929B2Sep 6, 2022
Railroad track guidance systems and methods
GEORGETOWN RAIL EQUIP CO0 citations53