Number | Date | Country | Kind |
---|---|---|---|
81 24291 | Dec 1981 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3897281 | Gilbert et al. | Jul 1975 | |
4179317 | Sakai et al. | Dec 1979 | |
4401487 | Lockwood | Aug 1983 |
Number | Date | Country |
---|---|---|
2151171 | Apr 1973 | FRX |
2183522 | Dec 1973 | FRX |
Entry |
---|
Abstract (English) to French Patents 2,151,171 and 2,183,522. |