Assignee
DEV MARK INC
US·3 granted patents·61 citations·filing 1983–1996
Top patents by PatentIndex Score
3 records- 0165US5438935ARailroad car hatch cover mechanism with dual latch positions for safely venting hatchDEV MARK INC·Filed 1994·Granted Aug 8, 1995·27 cites·9 claims
- 0258US5644990ARailroad car hatch coverDEV MARK INC·Filed 1996·Granted Jul 8, 1997·23 cites·4 claims
- 0339US4543889AHatch cover seal assemblyDEV MARK INC·Filed 1983·Granted Oct 1, 1985·11 cites·4 claims
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