Display board and modules therefor

Details Display board and modules therefor Display board and modules therefor

1989-02-24

1992-11-17

Dorner, Kenneth J.

Card, picture, or sign exhibiting

Signs

Magnetic attaching feature

40615, G09F 704

Patent

active

051632411

ABSTRACT:
A display board for illustrating an electrical power distribution system or the like comprises a matrix of rectangular modules magnetically attached to a steel support board. The modules may comprise die cut steel base plates backed by sheets of magnetic rubber. Relatively permanent background graphics are silk screened upon the front faces of the modules. Foreground graphics representing features which are subject to change may be overprinted upon the background graphics in an ink which may be removed without disturbing the background graphics.

REFERENCES:
patent: 2764751 (1956-09-01), Gnadke
patent: 2804607 (1957-08-01), Nalle, Jr.
patent: 2816380 (1957-12-01), Sindell
patent: 2958948 (1960-11-01), Dunkelberger
patent: 3447249 (1969-06-01), Greger
patent: 3987558 (1976-10-01), Tsukamoto
patent: 4074452 (1978-02-01), Bellinder
patent: 4258920 (1981-03-01), Waldron et al.
patent: 4505061 (1985-03-01), Neuburger et al.
patent: 4942275 (1990-07-01), Addy et al.

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