Ultrasonic device for non-contact studying of materials. - Raycho Ilarionov; Ivan Simeonov; Hristo Kilifarev; Stanimir Yordanov; Nikolay Shopov; Hristo Ibrishimov (CompSysTech, 2010)

System for non-contact ultrasonic study of mediums and materials intended for embedding into automated manufacturing systems. - Stanimir Yordanov; Raycho Ilarionov; Ivan Simeonov; Hristo Kilifarev; Nikolay Shopov; Hristo Ibrishimov (CompSysTech, 2010)