Patent
   D349333
Priority
Jul 08 1991
Filed
Jul 08 1991
Issued
Aug 02 1994
Expiry
Aug 02 2008
Assg.orig
Entity
unknown
12
8
n/a
The ornamental design for a heat recovery unit, as shown and described.

FIG. 1 is a perspective view of the heat recovery unit embodying the design of the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is an opposite side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom view thereof.

King, Donald

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Patent Priority Assignee Title
3334400,
3913663,
4381819, Sep 14 1979 Flue heat reclaimer
4437513, Jun 02 1978 Heat recovery apparatus
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48540,
D264500, Oct 22 1979 Heat retrieval unit
D287047, May 30 1984 Heat transfer system
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