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Kjell-Ove L. Jansson
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Sandviken, SE
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last 30 patents
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Patent Grant
Down-the-hole drill tool for drilling in advance of a casing tube
Patent number
5,284,216
Issue date
Feb 8, 1994
Sandvik AB
Anders Brungs
E21 - EARTH DRILLING MINING
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Patent Grant
Drill tool
Patent number
4,770,259
Issue date
Sep 13, 1988
Santrade Limited
Kjell-Ove L. Jansson
E21 - EARTH DRILLING MINING
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Patent Grant
Drill element for percussion drilling
Patent number
4,760,887
Issue date
Aug 2, 1988
Santrade Limited
Kjell-Ove L. Jansson
E21 - EARTH DRILLING MINING