Patent
   D252041
Priority
Aug 04 1977
Filed
Aug 04 1977
Issued
Jun 05 1979
Expiry
Jun 05 1993
Assg.orig
Entity
unknown
2
3
n/a
The ornamental design for a fireplace heat exchanger device, as shown.

FIG. 1 is a perspective view of a fireplace heat exchanger device, showing our new design;

FIG. 2 is top plan view thereof;

FIG. 3 is front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a rear elevational view thereof.

Williams, Robert L., Williams, Frank M., Williams, J. Andrew

Patent Priority Assignee Title
D713519, Aug 30 2012 Vent guard
D744075, Oct 10 2013 IGNIS DEVELOPMENT INC Fireplace
Patent Priority Assignee Title
3905351,
4078542, Aug 11 1976 Morton Metalcraft Co. Fireplace grate and blower
D245097, Apr 28 1975 Production Experts, Inc. Housing for heat dispenser for a tubular fireplace heater
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Aug 04 1977Energy Conserving Equipment, Inc.(assignment on the face of the patent)
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