Back scratching device

The ornamental design for a back scratching device, as shown and described.

FIG. 1 is a front elevational view of a back scratching device showing my new design;

FIG. 2 is a rear elevational view of the back scratching device;

FIG. 3 is a side elevational view of the back scratching device; and,

FIG. 4 is a top plan view of the back scratching device, the opposite side view being a mirror image thereof.

Patent	Priority	Assignee	Title
D693965,	Nov 06 2012		Vertical back scratcher
D754246,	May 30 2014		Violin cushioning device
D830568,	Feb 24 2014	Ashley Diana Black International Holdings, LLC	Fascia tissue treatment device with a row of treatment elements
D850641,	Feb 24 2014	Ashley Diana Black International Holdings, LLC	Fascia tissue fitness device with six treatment elements
D913607,	May 28 2020	MODRENDESIGN PTY LIMITED	Cat scratcher
D949374,	Feb 22 2013	Ashley Diana Black International Holdings, LLC	Fascia tissue treatment device with a matrix of nine treatment elements
D952880,	Feb 24 2014	Ashley Diana Black International Holdings, LLC	Fascia tissue fitness device
ER6645,
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