Hermann Rathkamp

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Celle, DE

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Patents Grantslast 30 patents

Information Patent Grant
Drill tool for deep wells
- Patent number 4,460,053
- Issue date Jul 17, 1984
- Christensen, Inc.
- Rainer Jurgens
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cutter head, drill bit and similar drilling tools
- Patent number 4,200,159
- Issue date Apr 29, 1980
- Christensen, Inc.
- Eberhard Peschel
- B22 - CASTING POWDER METALLURGY