Patent ID: 7335421

Claim:
A heatable transparency, comprising: a first ply having a No. 1 surface and a No. 2 surface; a second ply having a No. 3 surface and a No. 4 surface, with the No. 2 surface facing the No. 3 surface; a vision area; and an electrically conductive coating formed in at least a portion of the vision area over at least a portion of the No. 2 or No. 3 surface, wherein the conductive coating comprises three or more metallic silver layers, and wherein the coating has a resistivity in the range of 0.6 Ω/□ to 1.7 Ω/□ at a supplied power in the range of 13 volts to 15 volts, wherein the transparency has a visible light transmittance of greater than or equal to 70% at a reference wavelength of 550 nm.