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Publication numberUSD249897 S
Publication typeGrant
Application numberUS 05/816,071
Publication dateOct 10, 1978
Filing dateJul 15, 1977
Publication number05816071, 816071, US D249897 S, US D249897S, US-S-D249897, USD249897 S, USD249897S
InventorsAllan H. Willinger
Original AssigneeWillinger Bros., Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Air stone
US D249897 S
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  1. The ornamental design for an air stone, substantially as shown.

FIG. 1 is a perspective view of an air stone, showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a rear elevational view;

FIG. 4 is a right side elevational view; and

FIG. 5 is a bottom plan view.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7681529Apr 11, 2008Mar 23, 2010J.W. Pet Company, Inc.Diffuser and anchor
U.S. ClassificationD30/106