| (84) |
Designated Contracting States: |
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AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
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| (30) |
Priority: |
17.04.2003 US 463882 P 12.04.2004 US 822353
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Date of publication of application: |
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01.02.2006 Bulletin 2006/05 |
| (73) |
Proprietor: National Oilwell Varco, L.P. |
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Houston, TX 77042 (US) |
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Inventor: |
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- PALIDIS, Anastasios
Katy, TX 77450 (US)
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Representative: Copsey, Timothy Graham et al |
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Kilburn & Strode LLP
20 Red Lion Street London WC1R 4PJ London WC1R 4PJ (GB) |
| (56) |
References cited: :
WO-A1-03/021061 US-A- 744 194 US-A- 1 090 955 US-A- 5 845 453
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FR-A1- 2 359 302 US-A- 795 947 US-A- 3 150 617
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