Inventor
HALLAM KEITH J
12 patents
⚠️ This page may combine multiple inventors who share the name “HALLAM KEITH J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PULLMAN INC
5 patentsUS4216725AAug 12, 1980
Combination door and emergency stairway exit
PULLMAN INC92 citations95
US4164188AAug 14, 1979
Self steering railway car
PULLMAN INC21 citations81
US4138949AFeb 13, 1979
Sleeping compartment upper berth
PULLMAN INC21 citations81
US4232793ANov 11, 1980
Car coupling arrangement for railway passenger cars
PULLMAN INC13 citations70
US4046081ASep 6, 1977
Headrest ladder
PULLMAN INC5 citations62
THRALL CAR MFG CO
5 patentsUS4766820AAug 30, 1988
Hopper car with automatic discharge door mechanism
THRALL CAR MFG CO69 citations94
US4884511ADec 5, 1989
Aluminum hopper car with cast collars interconnecting intersecting center sill hood with ridge hood and sloped end walls
THRALL CAR MFG CO50 citations92
US4843974AJul 4, 1989
Hopper car with automatic discharge door mechanism
THRALL CAR MFG CO37 citations91
USD313378SJan 1, 1991
Railroad hopper car end slope collar casting
THRALL CAR MFG CO0 citations51
USD311359SOct 16, 1990
Railroad hopper car cross ridge collar casting
THRALL CAR MFG CO0 citations51