Donald L. Freed Jr.

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Belleville, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Cutter drum assembly for a continuous mining machine
- Patent number 4,310,199
- Issue date Jan 12, 1982
- National Mine Service Company
- Donald L. Freed
- E21 - EARTH DRILLING MINING
Information Patent Grant
Material gathering device for a mining machine
- Patent number 4,296,856
- Issue date Oct 27, 1981
- National Mine Service Company
- Donald L. Freed
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining machine conveyor and apparatus for controlling the tension t...
- Patent number 4,090,601
- Issue date May 23, 1978
- National Mine Service Company
- Donald L. Freed
- E21 - EARTH DRILLING MINING
Information Patent Grant
Material gathering device for a mining machine
- Patent number 4,056,189
- Issue date Nov 1, 1977
- National Mine Service Company
- Donald L. Freed
- E21 - EARTH DRILLING MINING