Helmet plenum

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Description

FIG. 1 is perspective view of a helmet plenum.

FIG. 2 is a top view of a helmet plenum.

FIG. 3 is a front view of a helmet plenum.

FIG. 4 is a back view of a helmet plenum.

FIG. 5 is a bottom view of a helmet plenum.

FIG. 6 is a side view of a helmet plenum; and,

FIG. 7 is another side view of a helmet plenum.

Claims

The ornamental design for a helmet plenum, as shown and described.

Referenced Cited
U.S. Patent Documents
6516802 February 11, 2003 Hansen et al.
7556043 July 7, 2009 Ho et al.
7665465 February 23, 2010 Radney
7814911 October 19, 2010 Bordewick et al.
8091553 January 10, 2012 Bordewick et al.
8127765 March 6, 2012 Ho et al.
D716505 October 28, 2014 Wu
D716506 October 28, 2014 Wu
8858692 October 14, 2014 Dwyer et al.
Patent History
Patent number: D728777
Type: Grant
Filed: Oct 18, 2013
Date of Patent: May 5, 2015
Assignee: Lincoln Global, Inc. (City of Industry, CA)
Inventor: Theresa Spear (Highland Heights, OH)
Primary Examiner: Wan Laymon
Assistant Examiner: Mark Booker
Application Number: 29/470,220
Classifications
Current U.S. Class: Respirator, Vaporizer, Or Inhalation Tube (4) (D24/110)