Patent
   D273323
Priority
Feb 09 1981
Filed
Aug 07 1981
Issued
Apr 03 1984
Expiry
Apr 03 1998
Assg.orig
Entity
unknown
1
5
n/a
The ornamental design for a fireplace heat exchanger, as shown and described.

FIG. 1 is a front elevational view of a fireplace heat exchanger, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a perspective view thereof.

Davidson, Keith J.

Patent Priority Assignee Title
D665898, Feb 02 2012 Craig D., Pless Andiron
Patent Priority Assignee Title
4010729, Apr 02 1975 Joglex Corporation Fireplace furnace
4170217, Jul 08 1977 Andirons having rear end locking means
4271814, Apr 29 1977 Heat extracting apparatus for fireplaces
CA47387,
D253067, Aug 15 1977 Caradon Mira Limited Fireplace heat exchanger
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Aug 04 1981DAVIDSON, KEITH J JO-AAR DEVELOPMENTS LIMITEDASSIGNMENT OF ASSIGNORS INTEREST 0039290089 pdf
Aug 07 1981432698 Ontario Ltd.(assignment on the face of the patent)
Apr 05 1983J0-AAR DEVELOPMENTS LIMITED432698 ONTARIO LTD ASSIGNMENT OF ASSIGNORS INTEREST 0041230046 pdf
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