Check valve
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Claims
The ornamental design for a check valve, as shown and described.
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D319866 | September 10, 1991 | Rogers |
D401671 | November 24, 1998 | Lewis et al. |
D425179 | May 16, 2000 | Wrigley et al. |
D460521 | July 16, 2002 | Fujita et al. |
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D520112 | May 2, 2006 | Beaton |
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D609305 | February 2, 2010 | Riendeau |
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D643093 | August 9, 2011 | Schmuckle et al. |
D647596 | October 25, 2011 | Bonnell |
Type: Grant
Filed: May 21, 2013
Date of Patent: Jun 24, 2014
Assignee: Federal Signal Corporation (Oak Brook, IL)
Inventor: Xiaolun Huang (Naperville, IL)
Primary Examiner: Cynthia Ramirez
Application Number: 29/455,455