Donald M. Frankie

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Mound, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Sand mixer
- Patent number 4,304,493
- Issue date Dec 8, 1981
- Donald M. Frankie
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Proportional control system for foundry sand mixing device
- Patent number 4,140,246
- Issue date Feb 20, 1979
- Donald M. Frankie
- B22 - CASTING POWDER METALLURGY