CENTEK LIMITED

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
E21B EARTH OR ROCK DRILLING 492

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9664001 Centralizer and associated devicesAug 26, 15May 30, 17[F16F, E21B]
8196670 Downhole deviceFeb 22, 10Jun 12, 12[E21B]
6997254 Method of making a centering device and centering device formed by that methodMar 19, 02Feb 14, 06[E21B]

Expired/Abandoned/Withdrawn Patents

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Top Inventors for This Owner

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