H01J 1/148

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
9790620 Method of reducing work function in carbon coated LaB6 cathodesJan 06, 17Oct 17, 17NUFLARE TECHNOLOGY, INC., NuFlare Technology America, Inc.,
9490098 Thermal-field type electron source composed of transition metal carbide materialJan 11, 16Nov 08, 16Applied Physics Technologies, Inc.
9299525 Thermionic cathode with even electric field distribution on electron emitting surfaceOct 07, 13Mar 29, 16NUFLARE TECHNOLOGY, INC.
9240301 Thermal-field type electron source composed of transition metal carbide material with artificial facetMar 27, 13Jan 19, 16Applied Physics Technologies, Inc.
9165737 High-brightness, long life thermionic cathode and methods of its fabricationOct 04, 12Oct 20, 15NUFLARE TECHNOLOGY, INC.
9070527 Electron gun and electron beam deviceFeb 25, 11Jun 30, 15Param Corporation