Double decker phonics bus

Details Double decker phonics bus Double decker phonics bus

1999-02-25

2000-04-18

Holtje, Martie K.

Office supplies; artists and teachers materials

Teaching material

Sensory feedback, e.g., audio-visual teaching machine

D19 59, D21552, 1907

Patent

active

D04230523

REFERENCES:
patent: D309643 (1990-07-01), Picozza et al.
patent: D364893 (1995-12-01), Willard et al.
patent: 1457840 (1923-06-01), Hutt
patent: 1615513 (1927-01-01), Heywood
patent: 3903617 (1975-09-01), Evans
patent: 4968255 (1990-11-01), Lee et al.
patent: 4988321 (1991-01-01), Goldfarb
patent: 5441149 (1995-08-01), Willard et al.
patent: 5716212 (1998-02-01), Lee

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