Protractor

Description

FIG. 1 is a top and front perspective view of a protractor showing my new design;

FIG. 2 is a bottom and rear perspective view;

FIG. 3 is a top and front perspective view, shown in a condition of use;

FIG. 4 is a top and front perspective view, shown in an alternate condition of use; and,

FIG. 5 is a top plan view thereof, shown with the slidable members fully extended.

Referenced Cited
U.S. Patent Documents
D284089 June 3, 1986 Hines
923313 June 1909 Anderson
1082377 December 1913 Ward
4233741 November 18, 1980 Bisset
4491724 January 1, 1985 Murray
4731933 March 22, 1988 Cope
Foreign Patent Documents
2600413 December 1987 FRX
573828 December 1945 GBX
Patent History
Patent number: D328256
Type: Grant
Filed: Jun 1, 1990
Date of Patent: Jul 28, 1992
Assignee: Polydron (UK) Limited
Inventor: Edward H. Harvey (Oxfordshire)
Primary Examiner: Donald P. Walsh
Assistant Examiner: Antoine D. Davis
Law Firm: Jones, Askew & Lunsford
Application Number: 7/532,082
Classifications