Patents Assigned to Sonident Anstalt Liechtensteinischen Rechts
  • Method of and apparatus for producing spherical waves in the ultrasonic range
    Patent number: 5828627
    Abstract: A generator for spherical ultrasonic waves can replace a point source transducer and has a large-area transducer whose output ultrasonic waves are condensed in a funnel and fed to a monomodal waveguide, e.g. a tube at the output end of which phase-correct perfectly spherical waves are emitted.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: October 27, 1998
    Assignee: Sonident Anstalt Liechtensteinischen Rechts
    Inventor: Wieslaw Bicz
  • Method of and apparatus for the detection of an ultrasonic field
    Patent number: 5589636
    Abstract: The number of transducers in the scanning of an ultrasonic field from an object is reduced by providing ultrasonic collectors at spaced apart locations in the medium and transmitting the ultrasonic waves which are collected to a transducer through waveguides or paths having different transit times. The waveguides can be individually of different lengths or can be of equal length and terminate at different distances along a common collecting waveguide.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: December 31, 1996
    Assignee: Sonident Anstalt Liechtensteinischen Rechts
    Inventor: Wieslaw Bicz
  • Apparatus for determining surface structures
    Patent number: 5515298
    Abstract: For determination of surface and special surface characteristics of an object, e.g. a fingerprint, the finger tip is placed on a convex surface of a support which is irradiated through a liquid or solid medium with spherical ultrasonic waves from a point source provided as a hole in a carrier for a ring of receiving transducers.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: May 7, 1996
    Assignee: Sonident Anstalt Liechtensteinischen Rechts
    Inventor: Wieslaw Bicz