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Clive John French
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Jambes, BE
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Patents Grants
last 30 patents
Information
Patent Grant
Method and apparatus for cleaning boreholes
Patent number
6,695,058
Issue date
Feb 24, 2004
Quartech Engineering Limited
Clive French
E21 - EARTH DRILLING MINING
Information
Patent Grant
Hydraulic control assembly
Patent number
6,595,296
Issue date
Jul 22, 2003
Quartech Engineering Limited
Clive John French
E21 - EARTH DRILLING MINING
Information
Patent Grant
Valve assembly
Patent number
6,508,309
Issue date
Jan 21, 2003
Quartech Engineering Limited
Clive John French
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Valve assembly
Publication number
20030094285
Publication date
May 22, 2003
Clive John French
E21 - EARTH DRILLING MINING
Information
Patent Application
Downhole tool
Publication number
20020157824
Publication date
Oct 31, 2002
Clive John French
E21 - EARTH DRILLING MINING