Assignee
PORTEC INC
46 granted patents·915 citations·filing 1974–2005
Top patents by PatentIndex Score
46 records- 0184US4437410APivotal slidable vehicle end enclosurePORTEC INC·Filed 1981·Granted Mar 20, 1984·46 cites·15 claims
- 0283US4887708ADrive apparatus for belt power turnsPORTEC INC·Filed 1989·Granted Dec 19, 1989·37 cites·20 claims
- 0383US4451188ACoil car with shiftable trough assembliesPORTEC INC·Filed 1981·Granted May 29, 1984·43 cites·15 claims
- 0481US5394958ARail lubrication apparatusPORTEC INC·Filed 1994·Granted Mar 7, 1995·49 cites·5 claims
- 0581US5294065APortable screening/dosing/mixing plantPORTEC INC·Filed 1993·Granted Mar 15, 1994·52 cites·18 claims
- 0677US4430032APedestal container locking devicePORTEC INC·Filed 1981·Granted Feb 7, 1984·34 cites·7 claims
- 0777US4084516AFoldable slidable vehicle end enclosurePORTEC INC·Filed 1977·Granted Apr 18, 1978·31 cites·15 claims
- 0877US4037513ACotter pinPORTEC INC·Filed 1976·Granted Jul 26, 1977·34 cites·4 claims
- 0974US3996860AVehicle end enclosurePORTEC INC·Filed 1975·Granted Dec 14, 1976·38 cites·20 claims
- 1072US4930621AAttachments for power turnsPORTEC INC·Filed 1988·Granted Jun 5, 1990·29 cites·20 claims
- 1170US5484111AHammers for hammer millsPORTEC INC·Filed 1994·Granted Jan 16, 1996·23 cites·14 claims
- 1269US4524314ARear travel guidance systemPORTEC INC·Filed 1983·Granted Jun 18, 1985·24 cites·4 claims
- 1368US4263853ARail car end door positioning keeper assemblyPORTEC INC·Filed 1979·Granted Apr 28, 1981·19 cites·10 claims
- 1467US5732827AScreening apparatusPORTEC INC·Filed 1995·Granted Mar 31, 1998·29 cites·9 claims
- 1567US5394977AApparatus and method for use in replacing conveyor beltsPORTEC INC·Filed 1993·Granted Mar 7, 1995·34 cites·16 claims
- 1666US4632308AAdjustable rail fastener assemblyPORTEC INC·Filed 1985·Granted Dec 30, 1986·28 cites·25 claims
- 1765US5348120ARail lubrication apparatusPORTEC INC·Filed 1992·Granted Sep 20, 1994·27 cites·2 claims
- 1865US4776736ATwin container hold downPORTEC INC·Filed 1987·Granted Oct 11, 1988·28 cites·3 claims
- 1964US4726456ABraking system for a molded fiberglass spiral chutePORTEC INC·Filed 1986·Granted Feb 23, 1988·23 cites·18 claims
- 2063US5598914ARemovable sidewall for a molded spiral chutePORTEC INC·Filed 1995·Granted Feb 4, 1997·24 cites·11 claims
- 2162US4273052ASpike driving apparatusPORTEC INC·Filed 1978·Granted Jun 16, 1981·23 cites·20 claims
- 2260US7650979B2Ball transfer devicePORTEC INC·Filed 2005·Granted Jan 26, 2010·7 cites·21 claims
- 2359US4027216AControl device for a synchronous motorPORTEC INC·Filed 1975·Granted May 31, 1977·18 cites·24 claims
- 2457US4974215ALoading dock range finding systemPORTEC INC·Filed 1989·Granted Nov 27, 1990·25 cites·14 claims
- 2556US4354235AGuidance system detector circuitPORTEC INC·Filed 1980·Granted Oct 12, 1982·13 cites·10 claims
- 2656US4273486AWinch and chain attachment assemblyPORTEC INC·Filed 1977·Granted Jun 16, 1981·18 cites·5 claims
- 2755US4444123ACurved roof hooper carPORTEC INC·Filed 1981·Granted Apr 24, 1984·15 cites·9 claims
- 2854US4092040AAdjustable twist lockPORTEC INC·Filed 1976·Granted May 30, 1978·14 cites·10 claims
- 2951US5060788AChain guide mounting apparatusPORTEC INC·Filed 1990·Granted Oct 29, 1991·15 cites·18 claims
- 3048US4196804ABelt tightener for spiral conveyor beltPORTEC INC·Filed 1978·Granted Apr 8, 1980·14 cites·5 claims
- 3145US4059055ARailway car hinge-deck lockPORTEC INC·Filed 1976·Granted Nov 22, 1977·10 cites·10 claims
- 3243US4150792ARail fastenerPORTEC INC·Filed 1977·Granted Apr 24, 1979·10 cites·16 claims
- 3341US4454823ABulk freight rail car with metallized interior surfacesPORTEC INC·Filed 1981·Granted Jun 19, 1984·9 cites·3 claims
- 3440US4306677ARail fastenerPORTEC INC·Filed 1980·Granted Dec 22, 1981·8 cites·17 claims
- 3539USD278171SIdler for a low profile tie downPORTEC INC·Filed 1981·Granted Mar 26, 1985·2 cites·1 claims
- 3639US4455947ACovered hopper carPORTEC INC·Filed 1982·Granted Jun 26, 1984·12 cites·2 claims
- 3737US4304359ARail fastenerPORTEC INC·Filed 1980·Granted Dec 8, 1981·6 cites·15 claims
- 3837US4265150AVariable follower rest for a lathePORTEC INC·Filed 1979·Granted May 5, 1981·10 cites·9 claims
- 3935US6050395AKnife edge converterPORTEC INC·Filed 1998·Granted Apr 18, 2000·10 cites·20 claims
- 4032US5143207ATension controlling and shock absorbing apparatus for an endless conveyorPORTEC INC·Filed 1991·Granted Sep 1, 1992·6 cites·17 claims
- 4131US4060197ARail fastener assemblyPORTEC INC·Filed 1976·Granted Nov 29, 1977·4 cites·10 claims
- 4229US4723807AWheel and track systemPORTEC INC·Filed 1986·Granted Feb 9, 1988·2 cites·20 claims
- 4329US3942454AAdjustable compression unit and lading band anchorPORTEC INC·Filed 1974·Granted Mar 9, 1976·7 cites·15 claims
- 4425US4256259AInsulated rail jointPORTEC INC·Filed 1978·Granted Mar 17, 1981·1 cites·1 claims
- 4523US5482152ASortation tablePORTEC INC·Filed 1994·Granted Jan 9, 1996·0 cites·7 claims
- 4617US4273284AInsulated rail jointPORTEC INC·Filed 1978·Granted Jun 16, 1981·4 cites·5 claims
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