| Number | Name | Date | Kind |
|---|---|---|---|
| 2434676 | Spender | Jan 1948 | A |
| D264205 | Logeman et al. | May 1982 | S |
| 5558155 | Ito | Sep 1996 | A |
| 6340056 | Huang et al. | Jan 2002 | B1 |
| D496006 | Tsai et al. | Sep 2004 | S |
| 7163049 | Zhong et al. | Jan 2007 | B2 |
| 20060262507 | Yu et al. | Nov 2006 | A1 |
| 20070121291 | Wang et al. | May 2007 | A1 |