The ornamental design for a snoringpreventionappliance, as shown and described.
FIG. 1 is a perspective view of a snoring prevention appliance showing the new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof, and an omitted right side view is a mirror image of the left side view;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a cross-sectional view according to A-A line of FIG. 2.
(1) The article is made of synthetic resin materials.
(2) The article is an oral appliance to prevent snoring and used by wearing on the upper and lower teeth of user.
(3) The article is also used in the treatment of allergic rhinitis and sinusitis.
(4) The broken lines shown in the snoring prevention appliance in FIG. 1 to FIG. 7 are for the purpose of illustration and form no part of the claimed design and the dot-dashed lines shown in the drawings represent boundaries between the claimed portion shown with solid lines and unclaimed portions shown with broken lines.