Number | Name | Date | Kind |
---|---|---|---|
2859378 | Gundert et al. | Nov 1958 | |
3651359 | Miyaoka | Mar 1972 | |
3702950 | Nakamura | Nov 1972 | |
3895253 | Schwartz et al. | Jul 1975 | |
3932786 | Campbell | Jan 1976 | |
3995194 | Blacker, Jr. et al. | Nov 1976 |
Entry |
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A. B. El-Kareh, Electron Beams, Lenses, and Optics, Academic Press, vol. 1, 1970, pp. 32-41. |