Electronic keyboard musical instrument

- Yamaha Corporation
Description

FIG. 1 is a top, front perspective view of an electronic keyboard musical instrument showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and

FIG. 7 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D282850 March 4, 1986 Futami
D289412 April 21, 1987 Bellini
D290370 June 16, 1987 Bellini
D312265 November 20, 1990 Naito
Foreign Patent Documents
721750-1 August 1987 JPX
721750 August 1987 JPX
732683 January 1988 JPX
Other references
  • Music Trades, Jan. 1986, p. 102 (Hohner's PK250 Keyboard). Music Trades, Feb. 1988, p. 100 (Roland's D-20 Keyboard).
Patent History
Patent number: D317774
Type: Grant
Filed: May 23, 1989
Date of Patent: Jun 25, 1991
Assignee: Yamaha Corporation (Shizuoka)
Inventor: Kazuyuki Mizushima (Hamamatsu)
Primary Examiner: Bernard Ansher
Assistant Examiner: Adir Aronovich
Law Firm: Weingarten, Schurgin, Gagnebin & Hayes
Application Number: 7/355,402
Classifications
Current U.S. Class: Keyboard Type (D17/1)