| Number | Date | Country | Kind |
|---|---|---|---|
| 0601530-9 | Jul 2006 | SE | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 1596701 | Williams | Aug 1926 | A |
| 1834179 | Place | Dec 1931 | A |
| 1979536 | Edgar | Nov 1934 | A |
| 2178842 | Paine | Nov 1939 | A |
| 2190132 | Alvord | Feb 1940 | A |
| 2220647 | Harley | Nov 1940 | A |
| 2309924 | Root | Feb 1943 | A |
| 2647504 | Hill | Aug 1953 | A |
| 4551950 | Unno et al. | Nov 1985 | A |
| 20090156104 | Kim et al. | Jun 2009 | A1 |
| 20090280726 | Kasuga et al. | Nov 2009 | A1 |
| 20090305618 | Morita et al. | Dec 2009 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11822593 | Jul 2007 | US |
| Child | 29347778 | US |