Educational device

Details Educational device Educational device

1976-04-19

1978-06-06

Skogquist, Harland S.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 59, G09B 1900

Patent

active

040927865

ABSTRACT:
An educational device simulating a shoe, including a plurality of plates that are located in vertically stacked relation, each of the plates being hingedly connected to an adjacent plate and being pivotal about a horizontal axis to selectively expose the interior surfaces thereof as each plate is pivotally moved relative to the others.

REFERENCES:
patent: D142669 (1945-10-01), Rogow
patent: 258164 (1882-05-01), Hoevenbergh
patent: 1326832 (1919-12-01), Baily
patent: 2180653 (1939-11-01), Yancey
patent: 2275956 (1942-03-01), Grace
patent: 2490342 (1949-12-01), Essington
patent: 2812183 (1957-11-01), Schiff
patent: 3055118 (1962-09-01), Betancourt
patent: 3740128 (1973-06-01), Adler

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