14/900089 (2015.12.18) / US 9658138 B2 (2017.05.23)
10-2015-0030305 (2015.03.04) / 10-1743913 (2017.05.31)
14/233,695 (2014.01.17) / US 9,416,654 B2 (2016.08.16)
10-2011-0080250 (2011.08.11) / 10-1277324 (2013.06.14)
10-2009-0102989 (2009.10.28) / 10-1090851 (2011.12.01)
10-2008-0127166 (2008.12.15) / 10-1046577 (2011.06.29)