Inventor · disambiguated record
Richard H. Dugge
Also filed as: DUGGE RICHARD H
35 granted patents·550 citations·filing 1974–1994
98Inventor score
Top patents by PatentIndex Score
35 records- 0197US3933100AHopper gate actuating mechanismACF IND INC·Filed 1974·Granted Jan 20, 1976·88 cites·14 claims
- 0281US4677917AHigh volume covered hopper car with loading from below and automatic unloadingACF IND INC·Filed 1985·Granted Jul 7, 1987·41 cites·14 claims
- 0375US4114785AControl valve for bottom discharge outletACF IND INC·Filed 1977·Granted Sep 19, 1978·24 cites·38 claims
- 0475US4036408AHopper having means for directing blasts of gas to a discharge outlet or the hopperACF IND INC·Filed 1975·Granted Jul 19, 1977·36 cites·5 claims
- 0565US4165820AAerator control arrangementACF IND INC·Filed 1975·Granted Aug 28, 1979·17 cites·43 claims
- 0663US5507235AGravity outletACF IND INC·Filed 1994·Granted Apr 16, 1996·25 cites·10 claims
- 0763US5063858ACovered hopper railway car with drop bottom doors and substantially vertical outlets to maximize discharge areaACF IND INC·Filed 1989·Granted Nov 12, 1991·19 cites·16 claims
- 0859US4323096ACombination vacuum relief valve and pressure relief valve which are protected from the atmosphereACF IND INC·Filed 1980·Granted Apr 6, 1982·16 cites·10 claims
- 0958US4382725APneumatic outlet valveACF IND INC·Filed 1981·Granted May 10, 1983·14 cites·20 claims
- 1057US4768684AGasket for hopper outletACF IND INC·Filed 1987·Granted Sep 6, 1988·14 cites·2 claims
- 1157US4718795AUnloading outlet assemblyACF IND INC·Filed 1987·Granted Jan 12, 1988·14 cites·3 claims
- 1257US4428585APermeable membrane seal assemblyACF IND INC·Filed 1982·Granted Jan 31, 1984·15 cites·17 claims
- 1356US4598646AHigh volume covered hopper carACF IND INC·Filed 1985·Granted Jul 8, 1986·20 cites·12 claims
- 1456US4018484APneumatic outlet for receiving female hose connections of different diametersACF IND INC·Filed 1975·Granted Apr 19, 1977·12 cites·8 claims
- 1555US4867073AInternal drainage system for hollow member structural assembly and methodACF IND INC·Filed 1988·Granted Sep 19, 1989·14 cites·10 claims
- 1655US4151935ASampling assembly for pneumatic outletACF IND INC·Filed 1978·Granted May 1, 1979·18 cites·6 claims
- 1754US4398557ACombination vacuum relief valve and pressure relief valveACF IND INC·Filed 1980·Granted Aug 16, 1983·16 cites·10 claims
- 1849US4944233AHatch arrangement for covered hopper carsACF IND INC·Filed 1989·Granted Jul 31, 1990·11 cites·15 claims
- 1948US4884723AHard gasket for retrofit installation on hopper outlet/hopper gasket outletACF IND INC·Filed 1989·Granted Dec 5, 1989·18 cites·7 claims
- 2048US4082365APneumatic outlet operating mechanismACF IND INC·Filed 1977·Granted Apr 4, 1978·9 cites·4 claims
- 2146US4466558AAerator control arrangementACF IND INC·Filed 1982·Granted Aug 21, 1984·15 cites·12 claims
- 2243US5232315AEnd adapter for railcar pneumatic outletACE IND INC·Filed 1992·Granted Aug 3, 1993·10 cites·11 claims
- 2341US5448955AGravity outlet latching mechanismACF IND·Filed 1994·Granted Sep 12, 1995·17 cites·20 claims
- 2439US4278107AAutomatic vacuum relief valve for hopper carsACF IND INC·Filed 1980·Granted Jul 14, 1981·7 cites·21 claims
- 2538US4568224AFluidizing outlet assembly including internal troughACF IND INC·Filed 1981·Granted Feb 4, 1986·9 cites·2 claims
- 2637US5355809AGasket for use on a railway hopper car outletACF IND INC·Filed 1993·Granted Oct 18, 1994·6 cites·8 claims
- 2737US5000358ALow profile pneumatic outletACF IND INC·Filed 1989·Granted Mar 19, 1991·9 cites·20 claims
- 2836US4618295APlenum chamber flow restrictor and check valveACF IND INC·Filed 1984·Granted Oct 21, 1986·8 cites·2 claims
- 2935US3958514AAutomatic hopper gate locking mechanismACF IND INC·Filed 1974·Granted May 25, 1976·7 cites·5 claims
- 3033US3958722ASelf indexing elbowACF IND INC·Filed 1974·Granted May 25, 1976·3 cites·21 claims
- 3132US4544306AAutomatic unloading outlet assemblyACF IND INC·Filed 1982·Granted Oct 1, 1985·2 cites·5 claims
- 3232US4248552AEnd cap arrangement utilizing large headed boltsACF IND INC·Filed 1979·Granted Feb 3, 1981·3 cites·6 claims
- 3331US5238333APneumatic outlet for railcarsACF IND INC·Filed 1992·Granted Aug 24, 1993·6 cites·24 claims
- 3430US5236287APneumatic outletACF IND INC·Filed 1992·Granted Aug 17, 1993·6 cites·20 claims
- 3521US5178317AWelding method for pneumatic outlet bottom cover assemblyACF IND INC·Filed 1992·Granted Jan 12, 1993·1 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →