Hermanus G. Grobbenhaar

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Herkenbosch, NL

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Patents Grantslast 30 patents

Information Patent Grant
Bending mandrel
- Patent number 6,244,092
- Issue date Jun 12, 2001
- Grand Prix Silencers B.V.
- Hermanus G. Grobbenhaar
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method and apparatus for bending a multiple tube
- Patent number 5,214,950
- Issue date Jun 1, 1993
- Grand Prix Silencers BV
- Hermanus G. Grobbenhaar
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...