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The ornamental design for a backpack frame, as shown and described. |
FIG. 1 is a top, front and right side perspective view of a backpack frame showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a front 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; and
FIG. 7 is a right side elevational view thereof.
Patent | Priority | Assignee | Title |
D744231, | Apr 14 2014 | Nathanial Brent, Erdmann | Adjustable pack frame |
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4015759, | May 27 1975 | Backpack frame having shoulder and hip supports with flexible connection to hip support | |
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130181, |
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