Inventor · disambiguated record
Joseph H. Defrees
Also filed as: DEFREES JOSEPH H
10 granted patents·152 citations·filing 1975–1982
90Inventor score
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10 records- 0187US4445533AAir check valve assembly for powdered bulk product transportALLEGHENY VALVE CO·Filed 1981·Granted May 1, 1984·51 cites·12 claims
- 0259US4126294AAdapter valve mechanism for transportation tankDEFREES JOSEPH H·Filed 1975·Granted Nov 21, 1978·18 cites·11 claims
- 0359US4040456AOpenable bottom loading adapter for transport tankDEFREES JOSEPH H·Filed 1976·Granted Aug 9, 1977·18 cites·10 claims
- 0457US4009862AHydraulically balanced remote controlled emergency valve for storage tankDEFREES JOSEPH H·Filed 1975·Granted Mar 1, 1977·21 cites·13 claims
- 0552US4508131ASafety valving for cargo tanks used for bulk transportation of hazardous commoditiesALLEGHENY VALVE CO·Filed 1982·Granted Apr 2, 1985·15 cites·7 claims
- 0646US4453698AStuffing box with O-ring detent for control mechanism of emergency valveALLEGHENY VALVE CO·Filed 1982·Granted Jun 12, 1984·10 cites·10 claims
- 0742US4457486ADischarge control means for a storage tank for liquidALLEGHENY VALVE CO·Filed 1982·Granted Jul 3, 1984·8 cites·14 claims
- 0831US4013096ALoading and unloading valve mechanism for transportation tankDEFREES JOSEPH H·Filed 1975·Granted Mar 22, 1977·4 cites·11 claims
- 0931US4011885AManifold-valve structureDEFREES JOSEPH H·Filed 1975·Granted Mar 15, 1977·3 cites·12 claims
- 1027US4406299ALiquid level valveDEFREES BARBARA BALDWIN·Filed 1981·Granted Sep 27, 1983·4 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →