Number | Name | Date | Kind |
---|---|---|---|
2977639 | Barkhuff et al. | Apr 1961 | |
3000058 | Thielen | Sep 1961 | |
3119129 | Evans et al. | Jan 1964 | |
3163686 | Dusel et al. | Dec 1964 | |
3425978 | Armour | Feb 1969 | |
3485347 | McGill et al. | Dec 1969 | |
3531552 | Getz et al. | Sep 1970 | |
3546841 | Smith et al. | Dec 1970 | |
3589967 | Shirakawa | Jun 1971 | |
3845183 | Harrison | Oct 1974 |
Number | Date | Country |
---|---|---|
47-46457 | Nov 1972 | JPX |
Entry |
---|
Thompson, Gum Plastics, Reinhold, N.Y., (1958), pp. 60-63, 112 & 113. |