FIG. 1 is a top, front and right side perspective view of a wheelchair-mounted oxygen bottle bracket showing my new design, the broken line depiction of a portion of a wheelchair armrest being for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a top plan view thereof.

The stanchion portion is shown broken away for convenience of illustration in FIGS. 2, 3 and 4.