Robert A. Hagen

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Blissfield, MI, US

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for producing bypass grooves
- Patent number 4,866,966
- Issue date Sep 19, 1989
- Monroe Auto Equipment Company
- Robert A. Hagen
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...