Patent ID: 9341444
Filing Date: 2016-05-17
CPC Classification: B44F,E01F,F41H,F41J,G09F,Y10T

Claim Text:
1. A covert sign to display an informational thermal image comprising: a non-conductive underlying base material; multiple and different thermal image patterns formed on said non-conductive underlying base material, wherein said multiple and different thermal image patterns are formed of said at least one conductive ink; a source of electric power; wherein said multiple and different thermal image patterns may be selectively activated to change the informational thermal image, wherein each of said multiple and different thermal image patterns comprise a complete electric circuit when the source of electric power is connected thereto and when the source of electric power is connected, this allows a flow of electric current to said at least one conductive ink and forms said multiple and different thermal image patterns being supplied with electric current and wherein said source of electric power has settings to adjust said flow of current to maximize visibility of said multiple and different thermal image patterns and compensate for variations in ambient temperature.