David Stryffeler

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Frankln, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
System and method of detecting dull and worn cutter bits
- Patent number 10,227,869
- Issue date Mar 12, 2019
- Joy Global Underground Mining LLC
- Edward L. Doheny
- E21 - EARTH DRILLING MINING
Information Patent Grant
System and method of detecting dull and worn cutter bits
- Patent number 9,920,624
- Issue date Mar 20, 2018
- Joy MM Delaware, Inc.
- Edward L. Doheny
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of controlling a miner to cause wobble in the cutting heads
- Patent number 8,967,728
- Issue date Mar 3, 2015
- Joy MM Delaware, Inc.
- David Stryffeler
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
SYSTEM AND METHOD OF DETECTING DULL AND WORN CUTTER BITS
- Publication number 20180163538
- Publication date Jun 14, 2018
- Joy MM Delaware, Inc.
- Edward L. Doheny
- E21 - EARTH DRILLING MINING
Information Patent Application
SYSTEM AND METHOD OF DETECTING DULL AND WORN CUTTER BITS
- Publication number 20160298452
- Publication date Oct 13, 2016
- Joy MM Delaware, Inc.
- Edward L. Doheny
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD OF CONTROLLING A MINER TO CAUSE WOBBLE IN THE CUTTING HEADS
- Publication number 20120187743
- Publication date Jul 26, 2012
- David Stryffeler
- E21 - EARTH DRILLING MINING