Patent
   D330248
Priority
Jul 23 1990
Filed
Jul 23 1990
Issued
Oct 13 1992
Expiry
Oct 13 2006
Assg.orig
Entity
unknown
10
22
n/a
The ornamental design for an air to air heat exchanger, as shown and described.

FIG. 1 is a front and right side perspective view of an air to air heat exchanger showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front and right side perspective view thereof on a reduced scale, shown in use, the broken line showing of environmental structure is for illustrative purposes only and forms no part of the claimed design.

Chagnot, Catherine J., Kinzelman, Craig J., Colah, Noshir D., Dewar, Harry

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D805627, Dec 18 2015 Montgomery Patent and Design, LP. Vent cover
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jul 12 1990CHAGNOT, CATHERINE J STIRLING TECHNOLOGY, INC ASSIGNMENT OF ASSIGNORS INTEREST 0054050662 pdf
Jul 12 1990KINZELMAN, CRAIG J STIRLING TECHNOLOGY, INC ASSIGNMENT OF ASSIGNORS INTEREST 0054050662 pdf
Jul 12 1990COLAH, NOSHIR D STIRLING TECHNOLOGY, INC ASSIGNMENT OF ASSIGNORS INTEREST 0054050662 pdf
Jul 17 1990DEWAR, HARRYSTIRLING TECHNOLOGY, INC ASSIGNMENT OF ASSIGNORS INTEREST 0054050662 pdf
Jul 23 1990Stirling Technology, Inc.(assignment on the face of the patent)
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