Marble raceway

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Description

FIG. 1 is a perspective view of a marble raceway showing my new design;

FIG. 2 is a side elevational view;

FIG. 3 is a top plan view; and

FIG. 4 is a bottom plan view.

Referenced Cited
U.S. Patent Documents
D23869 December 1894 Adams
D175470 August 1955 Kahn
D250301 November 21, 1978 Handler
1252158 January 1918 Okel
3028704 April 1962 Rumbaugh
Patent History
Patent number: D256811
Type: Grant
Filed: Oct 7, 1977
Date of Patent: Sep 9, 1980
Inventor: Raymond E. Crawford (Boise, ID)
Primary Examiner: Donald B. Moyer
Attorney: H. Ross Workman
Application Number: 5/840,196
Classifications
Current U.S. Class: D21/12; 46/43; D21/8
International Classification: D2101;