Ewald Hartwich

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Molbergen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Metal sheet with contour cut for vibration reduction
- Patent number 10,953,451
- Issue date Mar 23, 2021
- Friedrich Graepel AG
- Ewald Hartwich
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...

Patents Applicationslast 30 patents

Information Patent Application
Metal Sheet with Contour Cut for Vibration Reduction
- Publication number 20200269304
- Publication date Aug 27, 2020
- Friedrich Graepel AG
- Ewald Hartwich
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...