Educational-teaching device

Details Educational-teaching device Educational-teaching device

1986-05-01

1988-03-01

Murtagh, John E.

Education and demonstration

Question or problem eliciting response

Correctness of response indicated to examine by...

434427, 273153R, G09B 300

Patent

active

047282940

ABSTRACT:
An educational device with which a user employs selected positioning of two masks over an array of normally unintelligible information to decipher an intelligible message therefrom, the positioning of the masks being determined by correctly associating useful information on a base member carrying the unintelligible information with markers and indicia carried on the masks and base member.

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