by Evelyn M. H. MacDonald exectrix

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Khandallah, Wellington, NZ

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Patents Grantslast 30 patents

Information Patent Grant
Mineral impact breaking apparatus
- Patent number 4,662,571
- Issue date May 5, 1987
- George J. MacDonald
- B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...