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
Foreign Patent Documents
D234469 | March 1975 | Lindsay |
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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 |
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
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
Classifications