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Joao Siqueira de Matos
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Rio de Janeiro, BR
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Patents Grants
last 30 patents
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Patent Grant
System for direct vertical connection between contiguous subsea equ...
Patent number
7,422,066
Issue date
Sep 9, 2008
Petroleo Brasileiro S.A. Petrobras
Roberto Rodrigues
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
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Patent Application
System for injecting water, collected from subterranean aquifers an...
Publication number
20060157241
Publication date
Jul 20, 2006
Roberto Rodrigues
E21 - EARTH DRILLING MINING