Claims (1)
Claim 1 (Independent)
The ornamental design for a ventilation valve, as shown and described.
Full Description
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FIG. 1 is a top front perspective view of a ventilation valve showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a bottom perspective view thereof; and,
FIG. 4 is a top plan view thereof.
Citations
This patent cites (29)
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