Joseph E. Matta

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Bel Air, MD, US

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Patents Grantslast 30 patents

Information Patent Grant
Ventilation system for automated mining machines
- Patent number 4,200,036
- Issue date Apr 29, 1980
- The United States of America as represented by the Secretary of the Interior
- Joseph E. Matta
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of determining gas leakage through a mine stopping
- Patent number 4,173,141
- Issue date Nov 6, 1979
- The United States of America as represented by the Secretary of the Interior
- Fred N. Kissell
- G01 - MEASURING TESTING
Information Patent Grant
Face ventilation system for coal mines
- Patent number 4,157,204
- Issue date Jun 5, 1979
- The United States of America as represented by the Secretary of the Interior
- Fred N. Kissell
- E21 - EARTH DRILLING MINING