Swivel arm attachment for a helmet

The ornamental design for a swivel arm attachment for a helmet, as shown and described.

FIG. 1 is an elevational view of a swivel arm attachment for a helmet, showing my new design;

FIG. 2 is an elevational view seen from the right side thereof, the opposite side being a mirror image; and,

FIG. 3 is a perspective view of the side opposite that shown in FIG. 1.

Patent	Priority	Assignee	Title
D402421,	Aug 06 1996		Pair of detachable extended vision optical elements for a helmet
D675789,	Feb 25 2009	Lincoln Global Inc.	Welding helmet tilt arm
D721457,	May 16 2014	Gentex Corporation	Mount arm

Patent	Priority	Assignee	Title
193381,
202097,
D323225,	Oct 20 1988	GALLET S A	Helmet for security personnel
D343258,	May 20 1991		Sports hard hat having an integral audio device

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