Adjustable drafting tool for making perspective drawings

Description

FIG. 1 is a top plan view of an adjustable drafting tool for making perspective drawings showing my new design;

FIG. 2 is an end elevational view;

FIG. 3 is an end elevational view of the end not shown in FIG. 2;

FIG. 4 is a right side elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a bottom plan view; and,

FIG. 7 is a top perspective view thereof.

Referenced Cited
U.S. Patent Documents
D234469 March 1975 Lindsay
380360 April 1888 Spencer et al.
761033 May 1904 Cross
1150550 August 1915 Snyder
1380269 May 1921 Sumersville
1408800 March 1922 Cole
1759541 May 1930 Childress
2998654 September 1901 Hancox
3562919 February 1971 Green
4453318 June 12, 1984 Hayes
Foreign Patent Documents
302299 August 1916 DEX
5742 August 1889 GBX
Patent History
Patent number: D339376
Type: Grant
Filed: Apr 9, 1990
Date of Patent: Sep 14, 1993
Assignee: Masaharu Abe (Musashino)
Inventor: Masaharu Abe (Musashino)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Martha Thompson
Law Firm: Lahive & Cockfield
Application Number: 7/506,358