Patent ID: 7216447

Claim:
A display device for displaying advertising material on a stair tread riser, the display device comprising a carrier plate having a first retaining channel and a second retaining channel along opposing longitudinal edges, said carrier plate is adapted to be attached to a stair riser, an advertising plate adapted to be disposed on the carrier plate and within said first retaining channel and said second retaining channel, and a lockable end cap configured to be locked on one side of said carrier plate, said lockable end cap having a recess on the underside thereof and two edge portions at opposite edges of said end cap and on both sides of said recess, wherein said recess is configured to accommodate an end of said advertising plate and wherein said edge portions are configured to abut said first retaining channel and said second retaining channel, respectively, in a non-overlapping manner and wherein said edge portions constrain said advertising plate between said channels, wherein when said lockable end cap is locked on said carrier plate.