FIG. 1 is a front top side perspective view of a first embodiment of a dry powder inhaler showing our design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a rear end view thereof;

FIG. 5 is a front end view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a side view thereof;

FIG. 8 is an opposing side view thereof;

FIG. 9 is a front top side perspective view of a second embodiment of a dry powder inhaler showing our new design;

FIG. 10 is a front perspective view thereof;

FIG. 11 is a bottom view thereof;

FIG. 12 is a back end view thereof;

FIG. 13 is a front end view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a side view thereof; and,

FIG. 16 is an opposing side view thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design.