Number | Name | Date | Kind |
---|---|---|---|
1659952 | Hurley | Feb 1928 | |
3734509 | Glass et al. | May 1973 | |
4409277 | Michel | Oct 1983 | |
4681324 | Karabed et al. | Jul 1987 | |
5259907 | Soules et al. | Nov 1993 | |
5465975 | Shull et al. | Nov 1995 |
Entry |
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"Lightless Light", Scientific American, Philip H. Smith, pp. 324-327, Dec. 1940. |