Donald R. Macrae

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Transvaal, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Process for welding a railway rail, aluminothermic heating blocks f...
- Patent number 4,830,611
- Issue date May 16, 1989
- Elektro-Thermit GmbH
- Johannes Guntermann
- F24 - HEATING RANGES VENTILATING