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2023
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Invention
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Fully piggable differential pressure actuated valve with variable restrictor. A valve system (10)... |
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Invention
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Fully piggable differential pressure actuated valve with variable restrictor. A valve system for ... |
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|
Invention
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Fully piggable differential pressure actuated valve with variable restrictor |
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2022
|
Invention
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Method for preventing spills resulting from pipeline failures. A petroleum pipeline safety system... |
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2017
|
Invention
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Differential pressure actuated valve. This specification discloses a Valve designed to be used in... |
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2008
|
Invention
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Barrier gate. A manually operated traffic barrier gate which may economically installed and maint... |
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2005
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Invention
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Retractable gate. A retractable gate comprising a movable arm gate having multiple sections which... |
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2004
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Invention
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Railroad grade crossing assembly. An articulate railroad grade crossing assembly. In a preferred ... |
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2003
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Invention
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Railroad grade crossing assembly. A railroad grade crossing assembly including a programmable con... |
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2001
|
Invention
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Railroad grade crossing assembly. A railroad grade crossing assembly for blocking vehicle access ... |
