Patents Assigned to O-Sense AB
  • Piezoelectric crystal microbalance device
    Patent number: 6006589
    Abstract: A device and a process for measuring resonant frequency and dissipation factor of a piezoelectric resonator are presented. After exciting the resonator to oscillation, the driving power to the oscillator is turned off after the decay of the oscillation of the resonator is recorded and used to give a measure of at least one of the resonators properties, such as dissipation factor, changes in the dissipation factor, resonant frequency and changes in the resonant frequency.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: December 28, 1999
    Assignee: O-Sense AB
    Inventors: Michael Rodahl, Fredrik Hook, Anatol Krozer, Bengt Kasemo