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United States Patent and Trademark Office

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Int. Cl.: 7<br />

Prior U.S. Cls.: 13, 19, 21, 23, 31, 34 <strong>and</strong> 35<br />

Reg. No. 2,906,693<br />

<strong>United</strong> <strong>States</strong> <strong>Patent</strong> <strong>and</strong> <strong>Trademark</strong> <strong>Office</strong> Registered Nov. 30, 2004<br />

WEATHERFORD/LAMB, INC. (DELAWARE<br />

CORPORATION)<br />

515 POST OAK BLVD., SUITE 600<br />

HOUSTON, TX 77027<br />

FOR: FILTERS FOR USE IN OIL AND GAS<br />

WELLS, IN CLASS 7 (U.S. CLS. 13, 19, 21, 23, 31, 34<br />

AND 35).<br />

FIRST USE 4-29-1994; IN COMMERCE 4-29-1994.<br />

TRADEMARK<br />

PRINCIPAL REGISTER<br />

THE MARK CONSISTS OF STANDARD CHAR-<br />

ACTERS WITHOUT CLAIM TO ANY PARTICULAR<br />

FONT, STYLE, SIZE, OR COLOR.<br />

SER. NO. 78-328,229, FILED 11-14-2003.<br />

ANDREA SAUNDERS, EXAMINING ATTORNEY

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