Number | Date | Country | Kind |
---|---|---|---|
3544770 | Dec 1985 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2750320 | Latham | Jun 1956 | |
3732193 | Suarz | May 1973 | |
3929751 | Gershberg | Dec 1975 | |
4138539 | Landolt et al. | Feb 1979 | |
4178221 | Boutin et al. | Dec 1979 | |
4283517 | Perricone et al. | Aug 1981 | |
4647598 | Yada et al. | Mar 1987 |
Number | Date | Country |
---|---|---|
752639 | Jan 1942 | DE2 |
1915903 | Mar 1969 | DEX |
1262101 | Feb 1969 | GBX |
Entry |
---|
European Search Report citing German references. |