John A. Ballantyne

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Bettendorf, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Alligator defect elimination
- Patent number 4,608,850
- Issue date Sep 2, 1986
- Aluminum Company of America
- John A. Ballantyne
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...