Number | Date | Country | Kind |
---|---|---|---|
3301265 | Jan 1983 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3390289 | Dijken et al. | Jun 1968 | |
3739206 | Schwarzmaller-Joch et al. | Jun 1973 | |
3786291 | Sidell | Jan 1974 | |
4255684 | Mischler et al. | Mar 1981 |
Number | Date | Country |
---|---|---|
693295 | Jul 1940 | DE2 |
796829 | Apr 1936 | FRX |