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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 |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Aug 04 1977 | Energy Conserving Equipment, Inc. | (assignment on the face of the patent) | / |
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