David Gollhofer

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Mt. Pleasant, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for manufacturing ventilated sheet-metal floor members
- Patent number 6,167,601
- Issue date Jan 2, 2001
- Conrad American
- David Gollhofer
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...