Educational toy

Details Educational toy Educational toy

1984-04-23

1985-08-13

Skogquist, Harland S.

Education and demonstration

Means for demonstrating apparatus, product, or surface...

Block or like manually manipulatable object having indicia...

434174, 446489, 411366, G09B 120

Patent

active

045347360

ABSTRACT:
An educational toy comprising a threaded shaft having blocks rigidly fixed to the opposite ends thereof and rotating and traveling blocks, spaced between the fixed end blocks and containing indicia to be aligned on faces of the rigidly fixed and rotating and traveling blocks.

REFERENCES:
patent: 668663 (1901-02-01), Stillman
patent: 935258 (1909-09-01), Immer
patent: 1194216 (1916-08-01), Morse
patent: 1995154 (1935-03-01), Morrison
patent: 2476194 (1949-07-01), Hollowell
patent: 2485280 (1949-10-01), Grace
patent: 2961796 (1960-11-01), Davis
patent: 3010227 (1961-11-01), Glass
patent: 3302311 (1967-02-01), Israel
patent: 3717942 (1973-02-01), Presby
patent: 4146978 (1979-04-01), Breslow

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