Number | Name | Date | Kind |
---|---|---|---|
3860425 | Ono et al. | Jan 1975 | |
3907573 | Franco et al. | Sep 1975 | |
4933270 | Bagchi | Jun 1990 | |
4970139 | Bagchi | Nov 1990 | |
4990431 | Bagchi et al. | Feb 1991 | |
5013640 | Bagchi et al. | May 1991 | |
5091296 | Bagchi et al. | Feb 1992 | |
5104776 | Bagchi et al. | Apr 1992 | |
5135844 | Bagchi et al. | Aug 1992 | |
5158863 | Bagchi et al. | Oct 1992 | |
5182189 | Bagchi et al. | Jan 1993 | |
5185230 | Bagchi et al. | Feb 1993 |
Number | Date | Country |
---|---|---|
2063695 | Jun 1981 | GBX |
Entry |
---|
Research Disclosure, Item #308119, Dec. 1989. |