Number | Name | Date | Kind |
---|---|---|---|
5117268 | Nishizawa et al. | May 1992 | |
5777427 | Tanaka et al. | Jul 1998 | |
5831374 | Morita et al. | Nov 1998 | |
5841121 | Sadwick et al. | Nov 1998 | |
5844253 | Kim et al. | Dec 1998 |
Entry |
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Stanley Angrst, Thermionic Generators, pp. 233-277, Direct Energy Conversion, 4th Edition, Dec. 1982.* |