Portable oxygen device

FIG. 1 is a top-plan view of a first embodiment of a portable oxygen device, showing our new design;

FIG. 2 is a perspective view thereof;

FIG. 3 is a right-side view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a back view thereof;

FIG. 8 is a top-plan view of a second embodiment of a portable oxygen device, showing our new design;

FIG. 9 is a perspective view thereof;

FIG. 10 is a right-side view thereof;

FIG. 11 is a left-side view thereof;

FIG. 12 is a front view thereof;

FIG. 13 is a bottom view thereof; and,

FIG. 14 is a back view thereof.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environment; the broken lines form no part of the claimed design.

The wire frame lines shown throughout the views are intended to indicate surface contours.