Number | Date | Country | Kind |
---|---|---|---|
9928270 | Dec 1999 | GB |
Number | Name | Date | Kind |
---|---|---|---|
1709563 | Christensen | Apr 1929 | A |
2339951 | Schettler et al. | Jan 1944 | A |
4458175 | Weekley | Jul 1984 | A |
5418119 | Simons | May 1995 | A |
5420003 | Gasper et al. | May 1995 | A |
5804359 | Simons | Sep 1998 | A |
5978105 | Sharman et al. | Nov 1999 | A |
Number | Date | Country |
---|---|---|
490388 | Jan 1930 | DE |
962403 | Apr 1957 | DE |
504283 | Apr 1939 | GB |
Entry |
---|
Research Disclosure, vol. 111, Jul. 1973; Item 11128. |