Number | Date | Country | Kind |
---|---|---|---|
41 36 661.1 | Nov 1991 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3454380 | Dickson et al. | Jul 1969 | |
3684735 | Oppenlaender et al. | Aug 1972 | |
3893615 | Johnson | Jul 1975 | |
3907701 | Liebold et al. | Sep 1975 | |
3997479 | Shimojo et al. | Dec 1976 | |
4333947 | Karjalainen et al. | Jun 1982 | |
4537701 | Oppenlaender et al. | Aug 1985 |
Entry |
---|
Derwent Abstract AN 73-79941U/52 (corresponding to DE 2 227 546). |
Derwent Abstract AN 85-203991/34 (corresponding to DE 3 404 538). |