Number | Date | Country | Kind |
---|---|---|---|
3903730 | Feb 1989 | DEX | |
3916838 | May 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3531920 | Hart | Oct 1970 | |
4268290 | Barrington | May 1981 |
Number | Date | Country |
---|---|---|
2138412 | Mar 1973 | DEX |
2835181 | Jan 1980 | DEX |
2427123 | Dec 1979 | FRX |
Entry |
---|
European Search Report for Application No. EP 90 25 0041, dated Apr. 18th, 1990. |