Inventor · disambiguated record
David Campbell
Also filed as: CAMPBELL DAVID · CAMPBELL DAVID M · Campbell David Mark
3 granted patents·1 pending application·39 citations·filing 2008–2015
66Inventor score
Technology areasG07F
Top patents by PatentIndex Score
4 records- 0180US8140187B2Multiple drawer and compartment vendingCAMPBELL DAVID M·Filed 2008·Granted Mar 20, 2012·35 cites·36 claims
- 0256US9147303B2Rotary hopperLOIGNON MARCUS·Filed 2011·Granted Sep 29, 2015·2 cites·11 claims
- 0351US9147304B2Reversible multi-position gearmotor and storage tray for vending machinesGEMBERLING JR GEORGE·Filed 2011·Granted Sep 29, 2015·2 cites·16 claims
- 0429US2016240033A1Tilt HopperAUTOMATED MERCHANDISING SYSTEMS INC·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →