Cepheid today announced that it has been issued U.S. Patent No. 6,878,540 entitled "Device for Lysing Cells, Spores, or Microorganisms", U.S. Patent No. 6,881,541 entitled "Method for Analyzing a Fluid Sample", and U.S. Patent No. 6,887,693 entitled "Device and Method for Lysing Cells, Spores, or Microorganisms". The three patents cover devices and methods for sample preparation including the extraction of nucleic acid from a fluid sample using ultrasonic lysis of cells.