Drafting ruler

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Description

FIG. 1 is a front elevational view of a drafting ruler showing my new design, the rear elevational view being flat, plain and unornamented;

FIG. 2 is a top edge view, the bottom edge view being identical; and

FIG. 3 is a right side edge view thereof, the left side edge view being identical.

Referenced Cited
U.S. Patent Documents
26251 November 1876 Copland
D204017 March 1966 Goldman
D206551 December 1966 Nystrom
D224717 September 1972 Pistorius
D273769 May 8, 1984 Sidrak
289512 December 1883 Darling
317188 May 1885 Pederson
4641436 February 10, 1987 Tzen et al.
4734993 April 5, 1988 Pan
4750270 June 14, 1988 Kundikoff
Patent History
Patent number: D316051
Type: Grant
Filed: Dec 18, 1987
Date of Patent: Apr 9, 1991
Inventor: Svein E. Strande (Jevnaker)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Antoine D. Davis
Law Firm: Darby & Darby
Application Number: 7/135,402
Classifications
Current U.S. Class: Rule, Tape Or Scale (10) (D10/71)