Portion of frame for respiratory mask
US D590059 S1
The ornamental design for a portion of frame for respiratory mask, as shown.
FIG. 1 is a front perspective view of a portion of a frame for a respiratory mask according to our design;
FIG. 2 is a front view thereof; and,
FIG. 3 is a bottom view thereof.
The dashed lines shown in FIGS. 1–3 disclose unclaimed subject matter, are for environmental purposes only, and thus form no part of the claimed design.