Keyboard with invisible keys

Details Keyboard with invisible keys Keyboard with invisible keys

2011-01-11

2011-01-11

Nunn, Freda S (Department: 2916)

Recording, communication, or information retrieval equipment

Computer, data processor equipment

Element or attachment

Design Patent

active

D0630638

CLAIM:
The ornamental design for a keyboard with invisible keys, as shown and described.

REFERENCES:
patent: 5439304 (1995-08-01), Phillips et al.
patent: D386754 (1997-11-01), Gifford et al.
patent: D436951 (2001-01-01), Andresen
patent: D485271 (2004-01-01), Kamegi
patent: D501478 (2005-02-01), Tzeng et al.
patent: D598451 (2009-08-01), Andre et al.

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