Patent ID: 8840744

Claim:
A method of preventing a handheld electronic device from slipping in relation to a smooth surface having a low coefficient of friction, comprising: selecting a non-molded anti-slip layer with a high coefficient of friction; providing a decorative layer of label stock; printing visual indicia directly onto a surface of the label stock; forming an anti-slip skin by bonding the decorative layer of label stock to the non-molded anti-slip layer having a soft pliable non-abrasive top surface finish with a high coefficient of friction, wherein the visual indicia is visible through the anti-slip layer; forming on the anti-slip skin a plurality of upraised circular bumps arrayed across the anti-slip skin, each bump having a smooth and rounded surface, and a plurality of curved ridges inwardly protruding from the top surface finish of the anti-slip layer; applying an adhesive layer to a bottom surface of the anti-slip skin; applying a protective release liner to the adhesive layer, the release liner being adapted for removal from the anti-slip skin to allow adhesion of the anti-slip skin to the handheld electronic device; and treating the edge of the anti-slip skin to protect the anti-slip skin from fraying, wherein the forming of the plurality of upraised circular bumps includes forming the plurality of upraised circular bumps such that they are grouped into a first group of upraised circular bumps and a second group of upraised circular bumps, the first group of upraised circular bumps having a larger diameter of upraised circular bumps than the second group of upraised circular bumps, and wherein the first group of upraised circular bumps are located in a central area of the anti-slip skin and the second group of upraised circular bumps are located around the first group of upraised circular bumps and near a periphery of the anti-slip skin.