Number | Date | Country | Kind |
---|---|---|---|
42516/74 | Oct 1974 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
2813302 | Beck | Nov 1957 | |
2857624 | Hanzel et al. | Oct 1958 | |
3078511 | Street | Feb 1963 | |
3148412 | Spreeuwers | Sep 1964 | |
3461490 | Cottingham | Aug 1969 | |
3517095 | Dunnington et al. | Jun 1970 | |
3792020 | Huck et al. | Feb 1974 | |
3817675 | Maiocco | Jun 1974 | |
3855173 | Huck et al. | Dec 1974 | |
4013276 | Boham et al. | Mar 1977 |
Number | Date | Country |
---|---|---|
2,514,307 | Jun 1975 | DEX |
2,303,366 | Jul 1974 | DEX |
2,514,307 | Jun 1975 | DEX |
358,188 | Jun 1972 | SUX |
Entry |
---|
Modern Plastics Encyclopedia, pp. 455 and 456, 1968. |