Language learning device

Office supplies; artists and teachers materials – Teaching material – Sensory feedback – e.g. – audio-visual teaching machine

Design Patent

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Design Patent

active

D0447179

CLAIM:
The ornamental design for a language learning device, as shown and described.

REFERENCES:
patent: D. 234360 (1975-02-01), Duncan
patent: D. 269442 (1983-06-01), Nakajima et al.
patent: D. 282935 (1986-03-01), Shifflett
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patent: D. 355896 (1995-02-01), Gaultier
patent: 4507750 (1985-03-01), Frantz et al.
patent: 4604698 (1986-08-01), Ikemoto et al.
patent: 4611995 (1986-09-01), Sado
patent: 4970659 (1990-11-01), Breedlove et al.
patent: 5503560 (1996-04-01), Stentiford
patent: 5724526 (1998-03-01), Kunita
patent: 5813861 (1998-09-01), Wood
patent: 5865625 (1999-02-01), Baskerville

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