Music – Instruments – Electrical musical tone generation
Reexamination Certificate
2005-01-13
2008-07-08
Donels, Jeffrey (Department: 2837)
Music
Instruments
Electrical musical tone generation
C084SDIG017
Reexamination Certificate
active
07396994
ABSTRACT:
An electronic keyboard instrument includes a keyboard attachment frame section having a keyboard section; a rear frame section joined to a rear portion of the lower surface of the keyboard attachment frame section and having pedals provided at its bottom portion; and an electronic circuit that generates heat when activated and includes a power transformer and an amplifier. The electronic circuit is vertically provided on the inner surface of a rear body section of the rear frame section. Hole portions and ventilation holes are provided at a bottom portion of the rear body section. Ventilation holes are provided at the keyboard attachment frame section.
REFERENCES:
patent: 3643000 (1972-02-01), Andersen
patent: 4656913 (1987-04-01), Yoshikawa
patent: 5335283 (1994-08-01), Torii
patent: 5789693 (1998-08-01), Lawson
patent: 6828497 (2004-12-01), Yataka et al.
patent: 6916980 (2005-07-01), Ishida et al.
patent: 58-18295 (1983-02-01), None
patent: 63-5693 (1988-01-01), None
patent: 5-52893 (1993-07-01), None
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