Patents Assigned to Viprotec
  • Ultrasonic pest control device and method for constructing the same
    Patent number: 5341762
    Abstract: An ultrasonic transmitter and methods for making the same. A plurality of blocks are provided and are formed such that, when they are coupled together, they form at least one ultrasonic whistle in fluid communication with a manifold and an acoustic horn.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: August 30, 1994
    Assignee: Viprotec
    Inventor: Robert L. Petersen