Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Patent
1988-02-19
1989-05-09
Grieb, William H.
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
434421, B43L 106
Patent
active
048285021
ABSTRACT:
A dry wipe marking board which is wall mountable and convertible to display a picture or painting while concealing the writing panel. The convertible dry wipe board is composed of a wall mountable support panel to which is secured a foldable dry wipe writing panel. When not in use the board may be folded along a hinge line to completely conceal the writing panel and display in its place a picture or painting which has been secured to the backside of the support structure. The conversion can be accomplished without removing the dry wipe board from its hanging position on a wall surface and without removing any component from the hanging structure. The dry wipe writing panel itself is preferably composed of a white pigmented polypropylene panel which is used for marking or writing thereon with conventional dry wipe marking instruments.
REFERENCES:
patent: 332050 (1885-12-01), Carter
patent: 2092323 (1937-09-01), Myers
patent: 2655740 (1953-10-01), Goodrich
patent: 2971277 (1961-02-01), Vaillancourt
Dennison Manufacturing Company
Grieb William H.
Josephs Barry D.
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