Number | Name | Date | Kind |
---|---|---|---|
3088659 | Nilsson et al. | May 1963 | A |
4281975 | Blackwell | Aug 1981 | A |
4610613 | Szymaszek | Sep 1986 | A |
6227834 | Andersen | May 2001 | B1 |
8202060 | Picouet | Jun 2012 | B2 |
Number | Date | Country | |
---|---|---|---|
Parent | 29544370 | Nov 2015 | US |
Child | 29620421 | US |