Ian R. Cahoon

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Kent, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for monitoring tunnel boring efficiency
- Patent number 8,172,334
- Issue date May 8, 2012
- The Robbins Company
- Leif R. Lindbergh
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
APPARATUS AND METHOD FOR MONITORING TUNNEL BORING EFFICIENCY
- Publication number 20090297273
- Publication date Dec 3, 2009
- Leif R. Lindbergh
- E21 - EARTH DRILLING MINING