Inventor
RITTER JOHN A
US6 patents
⚠️ This page may combine multiple inventors who share the name “RITTER JOHN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
THRALL CAR MFG CO
4 patentsUS4766820AAug 30, 1988
Hopper car with automatic discharge door mechanism
THRALL CAR MFG CO69 citations94
US4843974AJul 4, 1989
Hopper car with automatic discharge door mechanism
THRALL CAR MFG CO37 citations91
US4930427AJun 5, 1990
Railroad gondola or hopper car, particularly a coal car
THRALL CAR MFG CO64 citations90
US4759294AJul 26, 1988
Railroad car with double stack container restraint system
THRALL CAR MFG CO22 citations81