Number | Name | Date | Kind |
---|---|---|---|
2519722 | Turner | Aug 1950 | |
2854349 | Dreyfus et al. | Sep 1958 | |
3758185 | Gelber | Sep 1973 | |
4065626 | Franz | Dec 1977 | |
4093349 | Mills | Jun 1978 | |
4142006 | Choyke et al. | Feb 1979 |
Entry |
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Reale, Manufacturing Optics International, vol. 22, No. 1, Jul. 1969, pp. 9, 11-13. |
Hass et al, Jour. of Vacuum Science and Technology, vol. 4, No. 2, Mar./Apr. 1967, pp. 71-79. |