The California Institute of Technology has received US Patent No. 8,104,497, "Microfabricated elastomeric valve and pump systems." The elastomeric structure is fabricated by forming an elastomeric layer on top of a micromachined mold, where the micromachined mold includes a raised protrusion that forms a recess extending along a bottom surface of the layer. A second elastomeric layer is then formed on top of a second micromachined mold, where the second micromachined mold has a similar protrusion on the bottom surface of the layer.

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