Irvine-based cell phone designer Hop-on is on a self-declared, patent-fueled "roll." Earlier this month, the company delivered two solid punches to the mobile phone industry by announcing it had been granted design patents covering both MP3 speaker phones and flip-phone mobile phone designs. Now, in a move which may have other cell phone makers and mobile operators quaking in their boots, Hop-on has announced maker Motorola has licensed Hop-on’s MP3 phone and flip-phone patents for an undisclosed amount.