A current transforming harvester is capable of producing power from a conductor on a preexisting power grid without alteration of the conductor or the preexisting power grid. An existing three dimensional carving is captured by a computer, and converted into a NURBS surface. Activation of the marking molecules can be through radiation introduced into multiple regions, each extending along a plane substantially perpendicular to the depth direction. The seal is represented by an expert in a specific field. In one aspect of the invention, data pertaining to multiple communication channels are encoded in time-divided portions of each UWB pulse.