Grace Bio Labs of Bend, Ore., has received US Patent No. 8,034,306, "Reaction surface array diagnostic apparatus including a flexible microtitre plate." The device includes a substrate containing reaction surfaces as well as plate wells that can be aligned with one of the reaction surfaces to form a fluid-tight well. According to the patent, the plate is formed of a flexible material that may have an adhesive on one surface. Interlocking latches are also formed on the plate as is a frame for sealing the plate to the substrate.