James E. Ludwig

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Hasilngden, GB

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Patents Grantslast 30 patents

Information Patent Grant
Air sampling tube
- Patent number 8,424,394
- Issue date Apr 23, 2013
- Apollo America
- David L. Hall
- G01 - MEASURING TESTING
Information Patent Grant
Process for testing a detector mounted within a duct
- Patent number 8,266,974
- Issue date Sep 18, 2012
- David L. Hall
- F24 - HEATING RANGES VENTILATING

Patents Applicationslast 30 patents

Information Patent Application
DETECTOR HOUSING
- Publication number 20110076902
- Publication date Mar 31, 2011
- David L. Hall
- F24 - HEATING RANGES VENTILATING
Information Patent Application
DETECTOR HOUSING
- Publication number 20110072882
- Publication date Mar 31, 2011
- David L. Hall
- F24 - HEATING RANGES VENTILATING
Information Patent Application
AIR SAMPLING TUBE
- Publication number 20110036445
- Publication date Feb 17, 2011
- Air Products and Controls Inc.
- David L. Hall
- G01 - MEASURING TESTING