Assignee
DIFFERENTIAL STEEL CAR CO
US·3 granted patents·103 citations·filing 1989–1990
Top patents by PatentIndex Score
3 records- 0184US5144895AHopper door apparatus for a railway carDIFFERENTIAL STEEL CAR CO·Filed 1990·Granted Sep 8, 1992·58 cites·11 claims
- 0273US5115748AHopper door and operating apparatus for a railway carDIFFERENTIAL STEEL CAR CO·Filed 1990·Granted May 26, 1992·43 cites·20 claims
- 0326US4964348ADrop end, open top rail carDIFFERENTIAL STEEL CAR CO·Filed 1989·Granted Oct 23, 1990·2 cites·16 claims
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