Johann Karl Wefers

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Kleinblittersdorf, DT

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Patents Grantslast 30 patents

Information Patent Grant
Resistance welding of sheet metal covered with non-metallic layers
- Patent number 3,989,919
- Issue date Nov 2, 1976
- SAID Otto Alfred Becker; by said Johann Karl Wefers
- Johann Karl Wefers
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR