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| 2250067 | Martin | Jul 1941 | A |
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| 4254715 | LaHaye et al. | Mar 1981 | A |
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| 4676176 | Bonomelli | Jun 1987 | A |
| 4884516 | Linsen | Dec 1989 | A |
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| D552757 | Murdock | Oct 2007 | S |
| 20040074167 | Drost | Apr 2004 | A1 |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29386306 | Feb 2011 | US |
| Child | 29439104 | US |