| Number | Date | Country | Kind |
|---|---|---|---|
| 1002390 | Dec 2010 | HK | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 3073410 | Gongoll et al. | Jan 1963 | A |
| 3798389 | Tokizaki | Mar 1974 | A |
| 4133053 | Lundin | Jan 1979 | A |
| 4802638 | Burger et al. | Feb 1989 | A |
| 5793878 | Chang | Aug 1998 | A |
| 5832098 | Chen | Nov 1998 | A |
| D484485 | Matsuoka | Dec 2003 | S |
| 6728388 | Nageno et al. | Apr 2004 | B1 |
| 6937725 | Liao | Aug 2005 | B2 |
| D512708 | Harris et al. | Dec 2005 | S |
| 7072483 | Lenhard-Backhaus | Jul 2006 | B2 |
| D549694 | Viduya et al. | Aug 2007 | S |
| 7372974 | Yanagishita et al. | May 2008 | B2 |
| D573581 | Gondo et al. | Jul 2008 | S |
| D583362 | Hsu et al. | Dec 2008 | S |
| D583800 | Jaakkola et al. | Dec 2008 | S |
| D592182 | Sanguinetti | May 2009 | S |
| D593995 | Shimizu | Jun 2009 | S |
| D613266 | Barry et al. | Apr 2010 | S |
| D652406 | Lee et al. | Jan 2012 | S |