| Patents for H01J 19 - Details of vacuum tubes of the types covered by group (1,326) |
|---|
| 05/14/1991 | US5015908 Fast warm-up cathode for high power vacuum tubes |
| 05/07/1991 | CA1283946C Very high speed integrated microelectronic tubes |
| 04/24/1991 | CN1050946A Electron tube |
| 04/17/1991 | EP0422451A1 Electron tube |
| 01/29/1991 | US4988910 Electron power tube cooled by circulation of a fluid |
| 01/09/1991 | EP0407252A1 Grid tube with a coupled-cavity output and the coupling element integrated within the tube |
| 01/09/1991 | EP0406886A2 Field-emission type switching device and method of manufacturing it |
| 12/04/1990 | US4975656 Enhanced secondary electron emitter |
| 11/21/1990 | CN1010530B Coating method for making emission filament used for ionization in mass spectrum field |
| 10/31/1990 | CN2064936U Glass-metal sealed-in fixed shielded tube of glass vacuum switch tube |
| 08/01/1990 | EP0380205A1 Fast warm-up cathode for high power vacuum tubes |
| 07/23/1990 | CA2008295A1 Fast warm-up cathode for high power vacuum tubes |
| 05/08/1990 | CA1268806A1 Electron tube with mesh or cage cathode |
| 04/18/1990 | CN2056279U Subminiature electron tube |
| 11/29/1989 | CN1037614A Coating method for making emission filament used for ionization in mass spectrum field |
| 11/08/1989 | EP0340258A1 Microwave integrated distributed amplifier with field emission triodes |
| 10/31/1989 | US4877996 Electron tube with control electrode remote from anode |
| 10/18/1989 | CN1036478A Multipurpose energy-saving unit for prolongating service life |
| 10/04/1989 | CN2045550U Multipurpose power-saving service life prolonging device (2) |
| 10/04/1989 | CN2045549U Multipurpose power-saving service life prolonging device (1) |
| 08/30/1989 | EP0330542A1 Electronic power tube cooled by means of a circulating fluid |
| 08/30/1989 | CN2043788U Fast electron vacuum device |
| 08/16/1989 | CN1034823A Cathode of electron tube |
| 06/07/1989 | CN1004452B Cathod for electric valve |
| 05/05/1989 | WO1989004087A1 Microwave integrated distributed amplifier with field emission triodes |
| 02/09/1989 | DE3725603A1 Grid bias generating circuit for HF amplifier electron tube - has forward polarised, series semiconductor diodes in feed line from negative anode voltage source to tube cathodes |
| 12/20/1988 | CA1247190A1 Energy efficient incandescent lamp with improved filament characteristics |
| 10/25/1988 | US4780684 Microwave integrated distributed amplifier with field emission triodes |
| 10/18/1988 | US4779022 Cooling structure for a screen grid electron tube such as a transmitter tetrode |
| 08/25/1988 | WO1988006345A1 Very high speed integrated microelectronic tubes |
| 05/19/1988 | DE3639254A1 Electron tube for low power |
| 05/17/1988 | US4745324 High power switch tube with Faraday cage cavity anode |
| 04/19/1988 | US4739213 Electron tube with support for pyrolytic graphite electrode |
| 03/02/1988 | EP0257278A1 Shield grid electron tube, particularly a high power, high frequency emitting tetrode |
| 03/01/1988 | US4728852 Device for fixing a pyrolytic graphite grid onto the base of an electron tube |
| 01/26/1988 | US4721885 Very high speed integrated microelectronic tubes |
| 01/19/1988 | US4720683 Circuit for preventing retarding field oscillations in electron tubes, especially for a pulse-width modulation stage in transmitters |
| 12/16/1987 | EP0249324A2 High-power switch |
| 02/17/1987 | US4644217 Electron tube with a device for cooling the grid base |
| 01/27/1987 | US4639633 Electron tube with cathode cooling device |
| 01/21/1987 | CN85106573A Highly reliable and durable cathod |
| 01/14/1987 | CN86104753A Cathode to be used for electronic valve |
| 12/02/1986 | US4626733 Radiator band for an air-cooled electron tube |
| 11/05/1986 | EP0200277A1 Electron tube |
| 10/08/1986 | EP0196503A1 Vacuum switch casing |
| 08/13/1986 | EP0190470A1 Electron tube |
| 02/18/1986 | US4571525 Resonant coaxial cavities for a grid vacuum tube |
| 01/28/1986 | US4566892 Method for forming glass to metal seals in structural members |
| 12/11/1985 | EP0164282A1 Electronic tube having a device for cooling the cathode |
| 11/27/1985 | EP0162754A1 Electronic tube having a device for cooling the grid base |
| 09/25/1985 | EP0155464A1 High-power electron tube |
| 05/22/1985 | EP0141925A1 Circuit for the suppression of retarding field oscillations in electronic tubes, especially for a pulse duration modulation stage of a transmitter system |
| 04/17/1985 | EP0137488A2 Platelet for the production of passages with glass-metal solderings |
| 09/26/1984 | EP0119362A1 Coaxial resonators for grid tubes |
| 09/04/1984 | US4469984 Grid-like electrode for electronic components and process for making same |
| 06/26/1984 | US4456851 Electron tube having a low impedance reduced stress anode structure |
| 02/21/1984 | US4433285 Integrated tube socket assembly |
| 01/03/1984 | CA1159722A2 Pellet of alkaline earth metal oxide impregnated with a solid, vaporizable organic protective material |
| 06/07/1983 | US4387320 Electron tube with cylindrical grid of pyrolytic graphite |
| 11/30/1982 | CA1136694A1 Method for assembling a base to an electron tube |
| 11/30/1982 | CA1136691A1 Electron tube with reduced secondary emission |
| 04/20/1982 | CA1122256A1 Bonded cathode and electrode structure with layered insulation, and method of manufacture |
| 02/16/1982 | CA1118480A1 Base assembly for an electron tube |
| 11/24/1981 | US4302705 Capacitive coupling device for an electron tube |
| 10/13/1981 | US4295077 Circumferentially apertured cylindrical grid for electron tube |
| 09/29/1981 | CA1109918A1 Tube with bonded cathode and electrode structure and getter |
| 07/07/1981 | US4277718 Modular electron tube with carbon grid |
| 03/03/1981 | US4254357 Multi-arrayed micro-patch emitter with integral control grid |
| 03/03/1981 | US4253717 CRT Socket |
| 02/10/1981 | US4250428 Layer of boron nitride as insulation between cathode, grid, and heater; aging resistance; stress relieving; microwave triode tubes |
| 01/20/1981 | US4245379 Method of fabrication of flat grids of pyrolitic graphite for electron tubes |
| 11/11/1980 | US4233539 Aluminum carbide or boride or boron carbide coating on copper electrode |
| 10/21/1980 | US4229674 Grid of pyrolytic graphite for a high-power electron tube and a method for the assembly of said grid |
| 09/16/1980 | US4223243 Tube with bonded cathode and electrode structure and getter |
| 09/16/1980 | CA1085907A1 Thermionic electron source with bonded control grid |
| 09/09/1980 | CA1085476A1 High voltage electron tube base with separate dielectric fill-hole |
| 09/09/1980 | CA1085475A1 High voltage electron tube base with drip relief means |
| 08/20/1980 | EP0014550A1 Method for assembling a base to an electron tube |
| 08/12/1980 | US4217014 Method for assembling a base to an electron tube |
| 08/12/1980 | CA1083310A1 Method of manufacturing grid electrodes for electron tubes |
| 07/15/1980 | CA1081807A1 Device provided with a band-pass filter constructed from coaxial resonator cavities |
| 07/08/1980 | CA1081313A1 Glassy carbon grid-like electrodes and method of manufacturing same |
| 07/01/1980 | CA1080787A1 Method of sealing an image intensifier tube, and an image intensifier tube thus produced |
| 04/30/1980 | EP0010128A1 Directly heated cathode for an electron tube with coaxial electrode structure and method of making such a cathode |
| 04/08/1980 | US4197481 Magnetically focussed tube |
| 04/02/1980 | EP0009444A1 Process for making pyrolytic graphite grid electrodes for electron tubes |
| 04/02/1980 | EP0009431A1 Capacitive coupling device for electronic tubes and electronic tube comprising such a device |
| 02/06/1980 | EP0007865A1 Electron tube with a cylindrical pyrolytic graphite grid |
| 02/05/1980 | CA1071299A1 Method of manufacturing grid electrodes for electron tubes and grid electrode manufactured according to the method |
| 11/13/1979 | US4174492 Device for attenuating cavity interference waves in a high-frequency electron tube |
| 05/22/1979 | US4155618 Base assembly for an electron tube |
| 05/01/1979 | US4152621 Electron discharge device |
| 04/03/1979 | US4147953 Cathode construction for linear beam tubes |
| 01/30/1979 | US4137477 Electrodes, for example grid-like electrodes for use in electron tubes, and a method for manufacturing same |
| 01/02/1979 | US4132965 Band-pass filter constructed from concentrically arranged coaxial resonator cavities |
| 11/28/1978 | US4127313 High voltage electron tube base with drip relief means |
| 10/24/1978 | CA1041151A1 Electron tube base and socket |
| 10/17/1978 | US4120080 Pyrolytic graphite electrode is cut, cleaned and annealed |
| 10/10/1978 | US4119880 Electronic valves |
| 10/10/1978 | CA1040025A1 Heat transfer structure |