Electric-discharge processing machine

Description

FIG. 1 is a top, front and left side perspective view of an electric-discharge processing machine showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a left side elevational view; and,

FIG. 6 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
3541291 November 1970 Johanson
4387284 June 7, 1983 Nicholas et al.
4990737 February 5, 1991 Obasa
4996762 March 5, 1991 Takayama
5049715 September 17, 1991 Tanaka
5075530 December 24, 1991 Lee
5086203 February 4, 1992 Kobayashi et al.
Foreign Patent Documents
221922 September 1988 JPX
2170136 July 1986 GBX
Patent History
Patent number: D331933
Type: Grant
Filed: Jun 26, 1990
Date of Patent: Dec 22, 1992
Inventor: Chin-Fong Chiang (Tai Ping Hsiang, Taichung Hsien)
Primary Examiner: Alan P. Douglas
Assistant Examiner: Antoine D. Davis
Law Firm: Varndell Legal Group
Application Number: 7/544,010
Classifications
Current U.S. Class: Miscellaneous (D15/199)