Changeable display device

Details Changeable display device Changeable display device

1976-03-29

1977-12-20

Mancene, Louis G.

Card, picture, or sign exhibiting

Check, label, or tag

Reinforced

35 27, G09F 1100

Patent

active

040633772

ABSTRACT:
A changeable display device comprising a two-dimensional array of rotatable display elements. The display elements are generally flat and have sides of contrasting colors. The display elements are manipulated to selectively display one or the other of the contrasting colors. The display elements of the array thereby form a number which is surrounded by a contrasting color.

REFERENCES:
patent: 950912 (1910-03-01), Harrington
patent: 1679520 (1928-08-01), Giroux
patent: 3740878 (1973-06-01), Oelsclaeger

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