Number | Date | Country | Kind |
---|---|---|---|
DM/078 532 | Jun 2012 | WO | international |
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3034655 | York | May 1962 | A |
3414394 | Poad | Dec 1968 | A |
4115277 | Swank | Sep 1978 | A |
4211661 | Perry | Jul 1980 | A |
5456835 | Castino et al. | Oct 1995 | A |
7985343 | Haldopoulos et al. | Jul 2011 | B2 |
8142654 | Kohl | Mar 2012 | B2 |