Patent ID: 7048422

Claim:
A see-through signaling apparatus, comprising: a) a single substantially transparent panel having a front and a rear surface substantially parallel to one another, said front surface of said single transparent panel being adapted for mounting to a vehicle window; b) a light-emitting element affixed to said rear surface of said single transparent panel and adapted to generate and project light outwardly, away from said front surface; c) substantially transparent means for delivering power to said light-emitting element operatively connected thereto and disposed on at least one of said front and said rear surfaces of said single transparent panel; and d) means, operatively connected to said light-emitting element for the control thereof and operatively connected to said means for delivering power, said controlling means being adapted and disposed to selectively control energization of said light-emitting element; whereby at least when said light-emitting element is in an unenergized state, visibility through said signaling apparatus is substantially unoccluded.