John M. Birckhead

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Friction spring release mechanism
- Patent number 7,819,198
- Issue date Oct 26, 2010
- John M. Birckhead
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Magnetically Initiated Actuation Mechanism
- Publication number 20140124266
- Publication date May 8, 2014
- John M. Birckhead
- G01 - MEASURING TESTING
Information Patent Application
Magnetically Initiated Actuation Mechanism
- Publication number 20140043122
- Publication date Feb 13, 2014
- John M. Birckhead
- G01 - MEASURING TESTING
Information Patent Application
Friction spring release mechanism
- Publication number 20060249285
- Publication date Nov 9, 2006
- John M. Birckhead
- E21 - EARTH DRILLING MINING