1. S.L. Peshkovskiy, et al, “Ultrasonic Rod Waveguide-Radiator ”, United States Patent #7,156,201; 2007

Abstract:
The present invention comprises an ultrasonic resonant rod waveguide-radiator with at least three cylindrical sections, one of which is an entrance section having a planar entrance surface and another of which is an exit section having a planar exit surface, and at least two sections having a variable cross-section. The cylindrical sections and sections of variable cross-section are arranged in alternating fashion and connected to each other acoustically rigidly. The dimensions of the cylindrical sections and the sections of variable cross-section are selected so that the gain of the waveguide-radiator is significantly greater than unity and the strain created by passage of ultrasonic waves through the waveguide-radiator is minimized, increasing the operational life of the waveguide-radiator and maximizing the amount of useful energy transmitted by the waveguide-radiator.

2. S.L. Peshkovsky, A.S. Peshkovsky, “High-Capacity Ultrasonic Reactor System ”, United States Provisional Patent Application #60/947,768; 2007

Abstract:
An ultrasonic reactor system with an appropriately designed reaction chamber used in conjunction with a compatible ultrasonic Barbell Horn or its derivative that provides a significant efficiency increase and an intensification of sonochemical and sonomechanical processes.  These enhancements arise from the ability of the reaction chamber to direct all treated liquid media through the highly active region located near the surface of the horn, as well as from improvements in the horn design providing significant increase in its output surface area and, therefore, increasing the size of the active region.