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1976-03-19 |
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British Gas Corp |
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1977-05-16 |
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Gebelius Sven Runo Vilhelm |
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1977-06-30 |
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1978-09-25 |
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1988-09-26 |
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Apparatus for installing a valve on or into an existing pipe
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1994-07-26 |
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2011-03-09 |
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inserto para suportar uma vedação de um conjunto de vedação de um preventor de blowout, e, método para vedar um tubo de um local de poço
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Stöbich Brandschutz GmbH |
Leitungsabschottvorrichtung zum Abschotten einer Leitung und Rohrleitung sowie zugeordnetes Verfahren
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National Oilwell Varco, L.P. |
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Shut-off device
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2015-05-05 |
2022-02-22 |
Thad Paul Sundrla |
Pipe repair device
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2015-05-05 |
2020-06-09 |
Thad Paul Sundrla |
Shut-off device
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2016-10-04 |
2018-04-11 |
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