Posterboard

Details Posterboard Posterboard

1995-07-12

1997-01-21

Ryan, Patrick

Stock material or miscellaneous articles

Composite

Of carbohydrate

428153, 428155, 428172, 4283211, 283 62, 283115, 283117, 40595, 33477, B32B 900

Patent

active

055958290

ABSTRACT:
Improved posterboard is formed from a rectangular posterboard having vertical side edges and horizontal top and bottom edges. Guide marking are applied to the posterbboard. The guide markings are visually perceptible at a writing distance away from the posterboard, and substantially imperceptible at a viewing distance length away from the posterboard.

REFERENCES:
patent: 5045378 (1991-09-01), Libby

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