Michael P. Armstrong

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Etwall, GB

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Patents Grantslast 30 patents

Information Patent Grant
Screening apparatus
- Patent number 4,428,832
- Issue date Jan 31, 1984
- Coal Industry (Patents) Limited
- Michael P. Armstrong
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Grant
Sizing screens
- Patent number 4,308,135
- Issue date Dec 29, 1981
- Coal Industry (Patents) Limited
- Michael P. Armstrong
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Grant
Sizing screens and feeder devices therefor
- Patent number 4,220,526
- Issue date Sep 2, 1980
- Coal Industry (Patents) Limited
- Michael P. Armstrong
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING