Inventor · disambiguated record
Keith J. Hallam
Also filed as: HALLAM KEITH J
12 granted patents·420 citations·filing 1976–1988
92Inventor score
Top patents by PatentIndex Score
12 records- 0196US4216725ACombination door and emergency stairway exitPULLMAN INC·Filed 1978·Granted Aug 12, 1980·92 cites·10 claims
- 0292US4766820AHopper car with automatic discharge door mechanismTHRALL CAR MFG CO·Filed 1987·Granted Aug 30, 1988·69 cites·15 claims
- 0390US4829908AHopper car automatic discharge door mechanism with operating lever adjustable supportTHRALL CAR MANUFACTURING CO·Filed 1988·Granted May 16, 1989·66 cites·24 claims
- 0486US4884511AAluminum hopper car with cast collars interconnecting intersecting center sill hood with ridge hood and sloped end wallsTHRALL CAR MFG CO·Filed 1988·Granted Dec 5, 1989·50 cites·10 claims
- 0586US4377058ACurved hopper car roofUNITED AMERICAN CAR CO·Filed 1980·Granted Mar 22, 1983·46 cites·22 claims
- 0679US4843974AHopper car with automatic discharge door mechanismTHRALL CAR MFG CO·Filed 1988·Granted Jul 4, 1989·37 cites·14 claims
- 0771US4138949ASleeping compartment upper berthPULLMAN INC·Filed 1977·Granted Feb 13, 1979·21 cites·9 claims
- 0870US4164188ASelf steering railway carPULLMAN INC·Filed 1977·Granted Aug 14, 1979·21 cites·26 claims
- 0956US4232793ACar coupling arrangement for railway passenger carsPULLMAN INC·Filed 1979·Granted Nov 11, 1980·13 cites·16 claims
- 1038US4046081AHeadrest ladderPULLMAN INC·Filed 1976·Granted Sep 6, 1977·5 cites·5 claims
- 1130USD313378SRailroad hopper car end slope collar castingTHRALL CAR MFG CO·Filed 1988·Granted Jan 1, 1991·0 cites·1 claims
- 1230USD311359SRailroad hopper car cross ridge collar castingTHRALL CAR MFG CO·Filed 1988·Granted Oct 16, 1990·0 cites·1 claims
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