Number | Name | Date | Kind |
---|---|---|---|
3628174 | Bridges et al. | Dec 1971 | |
3813612 | Schriever et al. | May 1974 | |
3826997 | Javan et al. | Jul 1974 | |
3934212 | Javan et al. | Jan 1976 |
Entry |
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Robinson, Science, vol. 184, June 7, 1974, pp. 1062-1064. |
Diubko et al., Int'L Aerospace Abstract No. A69-15175, p. 612, 1969. |