Number | Date | Country | Kind |
---|---|---|---|
8624872 | Oct 1986 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3301635 | Bergna et al. | Jan 1967 | |
3857924 | Halasz et al. | Dec 1974 | |
3892580 | Messing | Jul 1975 | |
4011096 | Sandell | Mar 1977 | |
4089932 | Maira et al. | May 1978 | |
4190457 | McDaniel | Feb 1980 | |
4448914 | Drinkuth et al. | May 1984 | |
4654314 | Takagi et al. | Mar 1987 |
Number | Date | Country |
---|---|---|
0200528 | Nov 1986 | EPX |
0264268 | Apr 1988 | EPX |
Entry |
---|
European Search Report (EP 87 30 9066). |