David Howard Kerr

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Burscough, GB

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Patents Grantslast 30 patents

Information Patent Grant
Contact block
- Patent number 8,119,940
- Issue date Feb 21, 2012
- Rockwell Automation Limited
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Safety switch
- Patent number 7,928,330
- Issue date Apr 19, 2011
- Rockwell Automation Limited
- Julian Poyner
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Safety switch
- Patent number 7,800,004
- Issue date Sep 21, 2010
- Rockwell Automation Limited
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Safety switch
- Patent number 7,724,112
- Issue date May 25, 2010
- Rockwell Automation Technologies, Inc.
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
CONTACT BLOCK
- Publication number 20080257696
- Publication date Oct 23, 2008
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SAFETY SWITCH
- Publication number 20080078658
- Publication date Apr 3, 2008
- EJA LIMITED
- Julian Poyner
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SAFETY SWITCH
- Publication number 20080023307
- Publication date Jan 31, 2008
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
SAFETY SWITCH
- Publication number 20080006116
- Publication date Jan 10, 2008
- David Howard Kerr
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Switch contacts
- Publication number 20060000700
- Publication date Jan 5, 2006
- EJA Limited
- David H. Kerr
- H01 - BASIC ELECTRIC ELEMENTS