Combined stringed instrument and keyboard

Musical instruments – Keyboard type – Combined with diverse article

Design Patent

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Design Patent

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29239739

CLAIM:
The ornamental design for a combined stringed instrument and keyboard, as shown and described.

REFERENCES:
patent: 3541912 (1970-11-01), Radke
patent: D255803 (1980-07-01), Leal
patent: D256366 (1980-08-01), Dworsky
patent: D278154 (1985-03-01), Baker
patent: D310090 (1990-08-01), Stone et al.
patent: 5596157 (1997-01-01), Williams
patent: 5691490 (1997-11-01), Williams
patent: 6111179 (2000-08-01), Miller
patent: 6274800 (2001-08-01), Gardner
patent: 6740800 (2004-05-01), Cunningham
patent: D523465 (2006-06-01), Williams

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