December 10, 1991
August 21, 1989
Dringenburg; Dean H.
Pfeffer; Terry A.
Attorney Or Agent:
Field Of Search:
U.S Patent Documents:
Foreign Patent Documents:
The ornamental design for a portable cooler, as shown and described.
FIG. 1 is a front elevational view of a portable cooler showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
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