Keyboard musical instrument having top board coupled with...

Music – Instruments – General features

Reexamination Certificate

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Reexamination Certificate

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10834257

ABSTRACT:
A front board, side boards and a rear board define the periphery of a cabinet for a keyboard musical instrument; a top board is connected to the front board through a mortise and tenon joint, and is further coupled to rear posts by means of an angle bar and bolts; the tenon is easily inserted into the mortise so as to make the assembling work easy and speedy.

REFERENCES:
patent: 2133368 (1938-10-01), Wallace
patent: 5588726 (1996-12-01), Lee
patent: 5666778 (1997-09-01), Grattan et al.
patent: 6180859 (2001-01-01), Konishi
patent: 6701984 (2004-03-01), Lamontagne et al.
patent: 55-4468 (1978-06-01), None
patent: 63-162398 (1988-10-01), None
patent: 2-119694 (1990-09-01), None
patent: 9-160538 (1997-06-01), None
Gran Touch DGP-2XG, Catalog (Yamaha News Release, Yamaha Piano Home Page: http://www.yamaha.co.jp), Jul. 1997, 2 pages, Yamaha Corporation, Hamamatsu, Japan.
Yamaha Clavinova CLP-555, Catalog (Yamaha News Release, Yamaha Piano Home Page: http://www.yamaha.co.jp
ews/1997/97082001.html), Aug. 1997, 1 page, Yamaha Corporation, Hamatsu, Japan.
DGP DUP—Yamaha Electronic Piano, Catalog DGP Series, Sep. 2003, 10 pages, Catalog code PDP309, Yamaha Corporation, Hamamatsu, Japan.

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