Card or book involving luminescence

Details Card or book involving luminescence Card or book involving luminescence

1980-03-19

1981-09-01

Mancene, Gene

Card, picture, or sign exhibiting

Display card

Folded

40442, 401522, G09F 100

Patent

active

042863996

ABSTRACT:
At least one of two openable leaves is provided with at least one light-emitting diode, a thin battery for lighting the diode and a switch assembly. On opening the leaves, the diode emits light, which is extinguished when the leaves are closed to provide an indication of unique interest.

REFERENCES:
patent: 2826844 (1958-03-01), Leika
patent: 3289342 (1966-12-01), Gibson
patent: 4055014 (1977-10-01), Schmidt

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