Marian Grondziel

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Herne, DE

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Patents Grantslast 30 patents

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Fiber for reinforcing concrete or similar materials made of wire of...
- Patent number 5,359,873
- Issue date Nov 1, 1994
- Vulkan Harex Stahlfasertechnik GmbH & Co. KG
- Marian Grondziel
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...