Number | Date | Country | Kind |
---|---|---|---|
3421864 | Jun 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3290261 | Goldblum | Dec 1966 | |
4080356 | Gergen et al. | Mar 1978 | |
4169868 | Schreckenberg et al. | Oct 1979 | |
4277577 | Burg et al. | Jul 1981 |
Number | Date | Country |
---|---|---|
1596900 | Sep 1981 | CAX |
1238210 | Apr 1967 | DEX |
2389657 | Dec 1978 | FRX |
Entry |
---|
Encyclopedia Britannica, Inc., "Rubber", p. 1179, 1979. |