Education and demonstration – Means for demonstrating apparatus – product – or surface... – Chalkboard or equivalent means having easily erasable surface
Patent
1993-11-15
1995-02-28
Mancene, Gene
Education and demonstration
Means for demonstrating apparatus, product, or surface...
Chalkboard or equivalent means having easily erasable surface
434421, 434430, B43L 100
Patent
active
053932323
ABSTRACT:
A visual aid system including a plasticized fabric covered fiberboard magnetic panel with the fiberboard having vertically extending and horizontally spaced strip magnets imbedded in the surface thereof and being secured at its rear surface to a supporting wall. A display panel made or porcelain enameled steel is magnetically attached to the magnetic panel. A tack panel is carried to the supporting wall and a cork panel is disposed between and is carried by said magnetic panel and said tack panel.
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patent: 4584223 (1986-04-01), Krapf
patent: 4717109 (1988-01-01), Johnston
patent: 5295342 (1994-03-01), Roche et al.
Mancene Gene
Shall Harold D.
Smith Jeffrey A.
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