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7357709 |
Metal vent
A metal vent having an aperture for the passage of a fluid, a porous membrane sealing the aperture, wherein the components of the vent are assembled by an interference fit.
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7074124 |
Ventilation system
The present invention relates to a ventilation system that allows air to circulate in a building but excludes pests such as birds, insects, moths and flies to enter the building. The ventilation...
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6946019 |
Meniscus membranes for separations
Gas separation membranes, especially meniscus-shaped membranes for gas separations are disclosed together with the use of such meniscus-shaped membranes for applications such as thermal gas valves,...
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