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Publication numberUSD657499 S1
Publication typeGrant
Application numberUS 29/383,730
Publication dateApr 10, 2012
Filing dateJan 21, 2011
Priority dateJul 8, 2010
Publication number29383730, 383730, US D657499 S1, US D657499S1, US-S1-D657499, USD657499 S1, USD657499S1
InventorsJohn W. Parkins, David Parkins, David L. Fergot, Douglas M. Russell
Original AssigneeRed Tail Hawk Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US D657499 S1
Abstract  available in
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  1. The ornamental design for earplug, as shown and described.

This invention was made with Government support under SBIR contract N68335-09-C-0003, awarded by the US Navy. The government has certain rights in the invention.

FIG. 1 is a perspective view of an earplug showing our new design.

FIG. 2 is a side view thereof.

FIG. 3 is an opposite side view of FIG. 2.

FIG. 4 is another side view thereof.

FIG. 5 is an opposite side view of FIG. 4.

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

Non-Patent Citations
1Van Wiljngaarden et al. "Development of the Wireless ‘Communications Earplug’ for Application in Military Aviation" J. Audio Eng. Soc., vol. 48, No. 6, Jun. 2000.
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
USD735180 *Apr 18, 2014Jul 28, 2015Surefire, LlcAcoustic coupler
U.S. ClassificationD29/112, D24/106