Inventor · disambiguated record
Ralph G. Portis
Also filed as: PORTIS RALPH G
6 granted patents·82 citations·filing 1981–1999
83Inventor score
Top patents by PatentIndex Score
6 records- 0171US5257771APowered actuator for valveMIDLAND MFG CORP·Filed 1993·Granted Nov 2, 1993·32 cites·20 claims
- 0255US6213449B1Handles for bottom outlet valve assemblyCAPITAL FORMATION INC·Filed 1999·Granted Apr 10, 2001·17 cites·18 claims
- 0351US5269342AT-fittingMIDLAND MFG CORP·Filed 1993·Granted Dec 14, 1993·14 cites·11 claims
- 0441US5131694AJoint seal between valve body and removable portMIDLAND MFG CORP·Filed 1991·Granted Jul 21, 1992·13 cites·9 claims
- 0532US4461397AProtective device for mobile tanks having bottom discontinuitiesMIDLAND MFG CORP·Filed 1981·Granted Jul 24, 1984·4 cites·1 claims
- 0620US5886312ASwitch level control for tank ullage determining systemMIDLAND MFG CORP·Filed 1997·Granted Mar 23, 1999·2 cites·23 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →