Helical strain relief device

The ornamental design for a helical strain relief device, as shown and described.

FIG. 1 is a top left perspective view of a helical strain relief device.

FIG. 2 is a front elevation view of the helical strain relief device.

FIG. 3 is a back elevation view of the helical strain relief device.

FIG. 4 is a right elevation view of the helical strain relief device.

FIG. 5 is a left elevation view of the helical strain relief device.

FIG. 6 is a top plan view of the helical strain relief device; and,

FIG. 7 is a bottom plan view of the helical strain relief device.

The broken lines depict portions of the helical strain relief that form no part of the claim.

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Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Oct 21 2016		Surmodics, Inc.	(assignment on the face of the patent)
Nov 02 2016	GANSKE, KARL	Surmodics, Inc	ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS	040208	0140	pdf
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