P1: “Environment recognition of audio input”, US Application No.: 13/183,424, Filed: July 14, 2011; US Patent No.: 8,812,310 B2, Issue date: August 19, 2014; Inventors: Ghulam Muhammad and Khaled S. Alghathbar
P2. “Tree harvesting tool”, Filed: May 29, 2019; US Patent No.: 10,485,171 B1, Issue Date: November 26, 2019: Inventors: Mohamed Amin Mekhtiche, et al.