Number | Name | Date | Kind |
---|---|---|---|
3656921 | Willcox | Apr 1972 | |
3742185 | Parks | Jun 1973 | |
3767891 | Haverstraw et al. | Oct 1973 | |
3769491 | De Long et al. | Oct 1973 | |
3867178 | Ritter et al. | Feb 1975 | |
3981737 | Evilampi et al. | Aug 1976 | |
4103067 | Jackson et al. | Jul 1978 | |
4207377 | Kindrick | Jun 1980 | |
4762736 | Garvey et al. | Aug 1988 | |
4814202 | Castelas | Mar 1989 |
Number | Date | Country |
---|---|---|
991562 | May 1965 | GBX |
1016777 | Jan 1966 | GBX |
1022621 | Mar 1966 | GBX |
1073338 | Jun 1967 | GBX |
1256421 | Dec 1971 | GBX |
1475172 | Jun 1977 | GBX |
Entry |
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German patent 1596833, Derwent abstract No.: 78924R-L. |