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ANDREW MACDONALD ROBIN
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ABERDEEN, GB
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Patents Grants
last 30 patents
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Patent Grant
One-trip milling system
Patent number
6,648,068
Issue date
Nov 18, 2003
Smith International, Inc.
Charles H. Dewey
E21 - EARTH DRILLING MINING
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Patent Grant
One trip milling system
Patent number
5,894,889
Issue date
Apr 20, 1999
Smith International, Inc.
Charles H. Dewey
E21 - EARTH DRILLING MINING
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Patent Grant
One trip milling system
Patent number
5,771,972
Issue date
Jun 30, 1998
Smith International, Inc.,
Charles H. Dewey
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
ONE-TRIP MILLING SYSTEM
Publication number
20020060073
Publication date
May 23, 2002
CHARLES H. DEWEY
E21 - EARTH DRILLING MINING