Patents Assigned to Alcohol Sensors International, Ltd.
  • Method and apparatus for sonic breath determination
    Patent number: 5734090
    Abstract: A method and apparatus for verifying an expiratory breath flow utilizes the sonic characteristics of a standardized breath as a reference. A breath sample is analyzed for the presence and absence of predetermined audio frequency components generated by the expiratory process. Breach sample validity is based upon a match between both the required and missing components. The length of time that the required components are present can further be used to validate the sample.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: March 31, 1998
    Assignee: Alcohol Sensors International, Ltd.
    Inventors: Ronald Koppel, Edwin Kirchmeier
  • Hand held breath analyzer housing
    Patent number: D370065
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: May 21, 1996
    Assignee: Alcohol Sensors International, Ltd.
    Inventors: Peter L. Squillante, Alan J. Squillante