Patents
Patents for H01J 19 - Details of vacuum tubes of the types covered by group (1,326)
09/1978
09/19/1978US4115720 Device having thermionic cathode heated by field-emitted electrons
08/1978
08/15/1978US4107566 Rugged quick-heating electron tubes
06/1978
06/20/1978US4096406 Thermionic electron source with bonded control grid
02/1978
02/28/1978US4076992 Vacuum tube grid structures of phosmic bronze having copper and copper alloy conical supports
02/28/1978US4076366 High voltage electron tube base with separate dielectric fill-hole
11/1977
11/29/1977US4060747 Phototube having domed mesh with non-uniform apertures
09/1977
09/06/1977USRE29390 Electric discharge tube, comprising a highly loaded anode
08/1977
08/09/1977US4040708 Cathode ray tube base
07/1977
07/05/1977US4034258 Device for attenuating very short parasitic waves in electronic tubes
07/05/1977US4034031 Method of manufacturing grid electrodes for electron tubes
04/1977
04/19/1977US4019079 Gas injected vacuum switch
04/12/1977US4017760 Parasitic oscillation suppressor for electronic tubes
01/1977
01/11/1977US4002943 Tunable microwave cavity
01/11/1977US4002884 Heater element for an indirectly heated cathode
11/1976
11/30/1976US3995188 Grid for an electronic tube
09/1976
09/07/1976US3979157 Electron tube base
08/1976
08/24/1976US3976909 Wire mesh cathode
07/1976
07/27/1976US3971964 Cylindric grid electrode structure for electronic tubes comprising carbon filaments coated with pyrolytic graphite
07/20/1976US3970971 Parasitic wave attenuator useable in high frequency electronic tubes
07/20/1976US3970768 Grid electrodes
06/1976
06/29/1976US3967150 Grid controlled electron source and method of making same
05/1976
05/25/1976US3958854 Spark gap apparatus
05/04/1976US3955114 Magnetically focused electron beam tube
03/1976
03/09/1976US3943398 Electronic tube with cylindrical electrodes
02/1976
02/03/1976US3936691 Color cathode ray tube frame-color selection electrode support structure
01/1976
01/20/1976US3934168 Grid support means for a planar tube
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