Fireplace combustion air duct

- C. Mayo, Inc.
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Description

FIG. 1 is a side elevational view of a fireplace combustion air duct, showing my new design;

FIG. 2 is a front elevational view thereof.

FIG. 3 is a top plan view thereof.

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
728355 May 1903 Bayless
869775 October 1907 Frisbie, Sr.
3190282 June 1965 Bauer
3289667 December 1966 Nelson
3756218 September 1973 Simpson
4020824 May 3, 1977 Dodson
4192286 March 11, 1980 Wormington
Patent History
Patent number: D258410
Type: Grant
Filed: Feb 27, 1978
Date of Patent: Mar 3, 1981
Assignee: C. Mayo, Inc. (Springdale, AR)
Inventor: Carlos Mayo (Springdale, AR)
Primary Examiner: Catherine E. Kemper
Attorney: Robert R. Keegan
Application Number: 5/881,890
Classifications
Current U.S. Class: D/7207
International Classification: D0708;