Number | Name | Date | Kind |
---|---|---|---|
3891582 | Desmarais | Jun 1975 | |
4799962 | Ahmed | Jan 1989 | |
4883536 | Burdick | Nov 1989 | |
4883537 | Burdick | Nov 1989 | |
5080717 | Young | Jan 1992 |
Entry |
---|
Whistler et al, Industrial Gums, Academic Press, New York, 1974, pp. 706-708, 716 (no month avail.). |