Inventor · disambiguated record
Roger L. Johnston
Also filed as: JOHNSTON ROGER L
11 granted patents·1 pending application·256 citations·filing 1976–2015
92Inventor score
Files withJ & R ENGINEERING COMPANY INC5J & R ENGINEERING CO INC2BUCYRUS ERIE CO1J & R ENG COMPANY INC1J & R ENGINEERING CO1
Top patents by PatentIndex Score
12 records- 0195US4160492AControl system for mobile self-propelled aerial liftSIMON KRAUSE INC·Filed 1977·Granted Jul 10, 1979·94 cites·8 claims
- 0273US5839874ACask transporter with bottom lift capabilityJ & R ENGINEERING CO·Filed 1996·Granted Nov 24, 1998·41 cites·19 claims
- 0372US5360123AGantry stabilizerJ & R ENGINEERING COMPANY INC·Filed 1993·Granted Nov 1, 1994·28 cites·8 claims
- 0470US4027801AOutrigger system for vehiclesBUCYRUS ERIE CO·Filed 1976·Granted Jun 7, 1977·22 cites·8 claims
- 0562US6017181ACask transporterJ & R ENGINEERING CO INC·Filed 1994·Granted Jan 25, 2000·16 cites·10 claims
- 0659US5865327AHydraulic boom for gantry and the likeJ & R ENGINEERING CO INC·Filed 1992·Granted Feb 2, 1999·16 cites·9 claims
- 0755US6328524B1Cask transporterJ & R ENGINEERING COMPANY INC·Filed 1999·Granted Dec 11, 2001·16 cites·26 claims
- 0839US6330951B1Hydraulic boom for gantry or the likeJ & R ENGINEERING COMPANY INC·Filed 1999·Granted Dec 18, 2001·7 cites·2 claims
- 0939US2003161708A1Triangulated mobile gantry craneFiled 2002·Application pending·0 cites
- 1038US6685038B1Extendible boom with locking mechanism having equalizer arrangementJ & R ENGINEERING COMPANY INC·Filed 1999·Granted Feb 3, 2004·10 cites·9 claims
- 1136US6010019ADual beam header connector plateJ & R ENGINEERING COMPANY INC·Filed 1997·Granted Jan 4, 2000·6 cites·20 claims
- 1234US10301153B2Pivoting axle wheeled mobile gantryJ & R ENG COMPANY INC·Filed 2015·Granted May 28, 2019·0 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →