Drawing board
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 25, 2000
Grant Date -
N/A
app pub date -
Jul 14, 1998
filing date -
Jul 14, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drawing board having a body and a generally transparent screen on the body. The screen has front and rear sides and contains a viscous opaque liquid and iron dust in the liquid. A magnetic eraser is movable within the body between a rest position away from the rear side of the screen and an operating position against that rear side for operation to move, through magnetic attraction, the iron dust away from the front side of the screen such that the iron dust becomes invisible on the screen. A spring biasses the eraser towards the rest position. A pen having a magnetic tip is used to draw on the screen.
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