FIG. 1 is a perspective view of our mini-portable oxygen concentrator showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a back elevational view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in FIGS. 1, 2, 4, 5, 6 and 7 are included for the purpose of illustrating portions of the portable oxygen concentrator that form no part of the claimed design.