Randall F. Johnson

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Franklin, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Noise reduced continuous miner
- Patent number 8,186,764
- Issue date May 29, 2012
- Joy MM Delaware, Inc.
- Randall F. Johnson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Displaceable filtering apparatus for airborne contaminates
- Patent number 5,597,393
- Issue date Jan 28, 1997
- Joy MM Delaware Inc.
- Randall F. Johnson
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
NOISE REDUCED CONTINUOUS MINER
- Publication number 20100276985
- Publication date Nov 4, 2010
- JOY MM DELAWARE
- Randall F. Johnson
- E21 - EARTH DRILLING MINING