Title: Entertainment and/or educational device

Abstract: An entertainment and/or educational device is proposed which comprises a housing having oppositely facing windows therein and a display element within the housing having related markings thereon, the individual ones of the said related markings being simultaneously visible through a respective one of the windows and the windows being provided in such disposition on the housing that the respective markings visible thereat can be viewed only from opposite sides of the housing.

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Inventors: Flynn, Dennis E.

Application Number: 833745
Filing Date: 1977-09-16
Publication_date: 1980-01-08
Assignee:
Primary Class(es): 434/347 40/518
Other Classes:
US Patent Ref:

669682	Mar, 1901	Carver	40/518.
1525696	Feb, 1925	Spencer	35/75.
1992944	Mar, 1935	Grudin	40/518.
2924889	Feb, 1960	Di Lauro	35/76.
3392459	Jul, 1968	Schure et al.	35/9.

Other Refs:
Primary Examiner: Grieb, William H.
Assistant Examiner:
Attorney: Pearson & Pearson