Assignee
YOUNGSTOWN STEEL DOOR CO
25 granted patents·285 citations·filing 1974–1987
Top patents by PatentIndex Score
25 records- 0178US4452147AIntermodal railway carYOUNGSTOWN STEEL DOOR CO·Filed 1981·Granted Jun 5, 1984·37 cites·2 claims
- 0278US4236459ADepressed center carYOUNGSTOWN STEEL DOOR CO·Filed 1978·Granted Dec 2, 1980·43 cites·9 claims
- 0375US4450773ASliding gate for a railroad hopper carYOUNGSTOWN STEEL DOOR CO·Filed 1981·Granted May 29, 1984·32 cites·6 claims
- 0464US4121084AMethod and apparatus for welding workpiecesYOUNGSTOWN STEEL DOOR CO·Filed 1976·Granted Oct 17, 1978·17 cites·2 claims
- 0564US3938446ADoor assemblies for closing rail car end openingsYOUNGSTOWN STEEL DOOR CO·Filed 1974·Granted Feb 17, 1976·17 cites·29 claims
- 0663US4344365ARailway hopper car gate anti-friction sealYOUNGSTOWN STEEL DOOR CO·Filed 1979·Granted Aug 17, 1982·18 cites·7 claims
- 0763US4240357AFolding rail car doorsYOUNGSTOWN STEEL DOOR CO·Filed 1979·Granted Dec 23, 1980·16 cites·10 claims
- 0860US4064810ARailway car door actuating apparatusYOUNGSTOWN STEEL DOOR CO·Filed 1975·Granted Dec 27, 1977·18 cites·7 claims
- 0959US4411560APneumatic hopper discharge outletYOUNGSTOWN STEEL DOOR CO·Filed 1981·Granted Oct 25, 1983·17 cites·13 claims
- 1042US4178857ARail house car door wear skidsYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Dec 18, 1979·10 cites·7 claims
- 1138US4344366ARailway car door driverYOUNGSTOWN STEEL DOOR CO·Filed 1979·Granted Aug 17, 1982·6 cites·6 claims
- 1237US4429921ASliding bearing and sealYOUNGSTOWN STEEL DOOR CO·Filed 1982·Granted Feb 7, 1984·6 cites·4 claims
- 1337US4390196ASliding door starter and closerYOUNGSTOWN STEEL DOOR CO·Filed 1981·Granted Jun 28, 1983·7 cites·5 claims
- 1437US4319429AAuxiliary crank endYOUNGSTOWN STEEL DOOR CO·Filed 1980·Granted Mar 16, 1982·7 cites·8 claims
- 1535US4164189ADoor assemblies for closing rail car end openingYOUNGSTOWN STEEL DOOR CO·Filed 1976·Granted Aug 14, 1979·7 cites·10 claims
- 1633US4162591ADoor driverYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Jul 31, 1979·5 cites·1 claims
- 1731US4324188AHopper discharge outlet and methodYOUNGSTOWN STEEL DOOR CO·Filed 1980·Granted Apr 13, 1982·2 cites·5 claims
- 1830US4260046APower wheel for folding doorsYOUNGSTOWN STEEL DOOR CO·Filed 1979·Granted Apr 7, 1981·2 cites·2 claims
- 1929US4210231APower wheel for folding doorsYOUNGSTOWN STEEL DOOR CO·Filed 1978·Granted Jul 1, 1980·1 cites·7 claims
- 2029US4112540AElevating and shifting railway car sliding door mechanismYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Sep 12, 1978·6 cites·1 claims
- 2127US4751793AFreight car door constructionYOUNGSTOWN STEEL DOOR CO·Filed 1987·Granted Jun 21, 1988·5 cites·19 claims
- 2224US4220098ARailway car door crank actuating mechanismYOUNGSTOWN STEEL DOOR CO·Filed 1977·Granted Sep 2, 1980·2 cites·8 claims
- 2323US4377304ADoor lockYOUNGSTOWN STEEL DOOR CO·Filed 1980·Granted Mar 22, 1983·2 cites·7 claims
- 2423US4353187ADoor repair method and repair section thereforYOUNGSTOWN STEEL DOOR CO·Filed 1980·Granted Oct 12, 1982·2 cites·11 claims
- 2521US4211038ARoller drop doorYOUNGSTOWN STEEL DOOR CO·Filed 1978·Granted Jul 8, 1980·0 cites·2 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →