Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Reexamination Certificate
2005-09-08
2009-08-04
Fernstrom, Kurt (Department: 3711)
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
Reexamination Certificate
active
07568916
ABSTRACT:
A drawing apparatus includes a rigid base surface, a flexible drawing surface, and a viscous, sticky medium disposed between the rigid base surface and the flexible drawing surface. Drawings can be formed by applying localized pressure, for example using a finger, fingernail, or stylus, to the flexible drawing surface thereby displacing a portion of the medium to place the drawing surface in near and persistent contact with the rigid base surface. Various color combinations for the medium, rigid base surface, and flexible drawing surface can be used.
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Fernstrom Kurt
Kirton & McConkie
Ralston William T.
Stuhmer Wilco R.
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