Number | Date | Country | Kind |
---|---|---|---|
39054/78 | Oct 1978 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3239570 | Slaugh et al. | Mar 1966 | |
3248432 | Riley et al. | Apr 1966 | |
3401204 | Mason et al. | Sep 1968 | |
3448157 | Slaugh et al. | Jun 1969 | |
3954877 | Gipson | May 1976 | |
4133966 | Pretzer et al. | Jan 1979 |
Entry |
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Wender et al., "Science", vol. 113, (1951), pp. 206-207. |