Davuluri, Ramamohan Rao; Ponnaiah, Ravi; Neela, Praveen Kumar; Batthini, Guruswamy; Venkata Narasimharao, Telagareddy; Ravanababu, Kosireddy; Sudheer, Kallepally Patent: US2014/73787 A1, 2014 ; Location in patent: Paragraph 0040; 0041 ;