Number | Date | Country | Kind |
---|---|---|---|
9012062 | May 1990 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
2698353 | Carr et al. | Dec 1954 | |
3589121 | Mulvey | Jun 1971 | |
3615959 | Nance | Oct 1971 | |
4125741 | Wahl et al. | Nov 1978 | |
4407854 | Pan | Oct 1983 | |
4435613 | Gaubert | Mar 1984 | |
4791240 | Marin et al. | Dec 1988 | |
4963645 | Marciano-Agostinelli et al. | Oct 1990 |
Number | Date | Country |
---|---|---|
1139169 | Nov 1962 | DEX |