J.A. Hermanson

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Algona, WA, US

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Circular and oval flanged rings for connecting ducting and method o...
- Patent number 5,983,496
- Issue date Nov 16, 1999
- J.A. Hermanson
- Jeffrey Allen Hermanson
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

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