David M. Campbell

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Winchester, VA, US

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Patents Grantslast 30 patents

Information Patent Grant
Rotary hopper
- Patent number 9,147,303
- Issue date Sep 29, 2015
- Automated Merchandising Systems Inc.
- Marcus Loignon
- G07 - CHECKING-DEVICES
Information Patent Grant
Reversible multi-position gearmotor and storage tray for vending ma...
- Patent number 9,147,304
- Issue date Sep 29, 2015
- George Gemberling
- G07 - CHECKING-DEVICES
Information Patent Grant
Multiple drawer and compartment vending
- Patent number 8,140,187
- Issue date Mar 20, 2012
- Automated Merchandising Systems, Inc.
- David M. Campbell
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
Tilt Hopper
- Publication number 20160240033
- Publication date Aug 18, 2016
- Automated Merchandising Systems, Inc.
- Kenneth B. Tenney
- G07 - CHECKING-DEVICES
Information Patent Application
Rotary Hopper
- Publication number 20130020348
- Publication date Jan 24, 2013
- Marcus Loignon
- G07 - CHECKING-DEVICES
Information Patent Application
Reversible multi-position gearmotor and storage tray for vending ma...
- Publication number 20120247246
- Publication date Oct 4, 2012
- George Gemberling, JR.
- G07 - CHECKING-DEVICES
Information Patent Application
Multiple drawer and compartment vending
- Publication number 20100106291
- Publication date Apr 29, 2010
- Automated Merchandising Systems, Inc.
- David M. Campbell
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES