US D305165 S
FIG. 1 is a perspective view of a two way check respiratory valve showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a side elevational view thereof, the opposite side being a mirror image; and
FIG. 5 is a top plan view thereof, the bottom plan view being a mirror image.