Activated work and method of forming same

Details Activated work and method of forming same Activated work and method of forming same

1986-05-30

1987-04-07

Curtis, Marshall M.

Communications: electrical

Continuously variable indicating

With meter reading

340784, 340716, 40454, 128736, G09G 336

Patent

active

046564691

ABSTRACT:
The present invention relates to a novel and unique activated work such as a child's book or a greeting card having at least two turnable pages in juxtaposed relationship and which is formed having a portion thereof that is essentially invisible in a first state but visible in a second state. Electrical signals are coupled to the second portion for selectively and reversibly changing the second portion from the invisible to the visible state when the pages are moved from their juxtaposed relationship.

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patent: 4437471 (1984-03-01), Nelson
patent: 4497126 (1985-02-01), Dejean

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