Demonstrator for indicating the effect of additive in engine oil and the like

- Dolores E. Stead
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Description

FIG. 1 is an isometric view from an upper aspect of a demonstrator for indicating the effect of additive in engine oil and the like, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D254793 April 22, 1980 Morey
1410456 March 1922 Cannon
2175638 October 1939 Rau
Patent History
Patent number: D270073
Type: Grant
Filed: Jun 12, 1981
Date of Patent: Aug 9, 1983
Assignee: Dolores E. Stead (Federal Way, WA)
Inventor: Clinton H. Morey (Mesa, AZ)
Primary Examiner: Melvin B. Feifer
Attorney: John O. Graybeal
Application Number: 6/273,060
Classifications
Current U.S. Class: Demonstrator Or Exhibitor (10) (D19/62)
International Classification: D1907;