Patent
   D253719
Priority
Jul 25 1977
Filed
Jul 25 1977
Issued
Dec 18 1979
Expiry
Dec 18 1993
Assg.orig
Entity
unknown
2
4
n/a
The ornamental design for a fireplace heat exchange tubing device, substantially as shown.

FIG. 1 is a perspective view of a fireplace heat exchange tubing device showing my new design;

FIG. 2 is a plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is an end elevational view thereof; and

FIG. 5 is an elevational view of the opposite end thereof.

The broken line disclosure of an air inlet fan and grille and an outlet grille in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.

DiDonato, Ronald C.

Patent Priority Assignee Title
D258609, Jul 20 1978 Seventy Seven Ltd. Clothes dryer vent valve and filter housing
D632131, Aug 28 2009 Premark FEG L.L.C.; PREMARK FEG L L C Fryer heat exchange tube
Patent Priority Assignee Title
4060196, Apr 12 1976 Heat extractor for stoves
4102320, May 13 1977 Fireplace heat exchanger
4103670, Apr 18 1977 Fireplace heat intensifier
4112914, Jan 02 1975 Combined fireplace hood and heating unit
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Aug 05 1980DIDONATO, RONALDCOLORADO CONCRETE MANUFACTURING COMPANYASSIGNMENT OF ASSIGNORS INTEREST 0038020572 pdf
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