Colorcode speller

Details Colorcode speller Colorcode speller

1974-10-02

1976-09-28

Grieb, Wm. H.

35 2, G09B 1100

Patent

active

039823334

ABSTRACT:
Means of teacher teaching and pupil learning to spell words and sentences, with code marked alphabet letters and code marked word and sentence lanes.

REFERENCES:
patent: 165126 (1875-06-01), Shepherd
patent: 450092 (1891-04-01), Wyman
patent: 1286157 (1918-11-01), Vizcarra
patent: 2439413 (1948-04-01), Mitchell

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