| Patents for H01J 23 - Details of transit-time tubes of the types covered by group (3,921) |
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| 09/18/1991 | EP0447207A2 Injection locked oscillators |
| 09/18/1991 | EP0447206A2 Cathode heater for magnetrons |
| 09/17/1991 | US5049782 Magnetron with harmonic suppression means |
| 09/04/1991 | EP0445009A1 Frequency-tuneable microwave tube |
| 09/03/1991 | US5045814 High impedance circuit for injection locked magnetrons |
| 09/03/1991 | US5045749 Electron beam generator and electronic devices using such a generator |
| 08/29/1991 | DE4100775A1 Electron gun for gyrotron - ensures homogeneous distribution in electron beam by bounding emission region(s) at sides by non-emitting edge region(s) |
| 08/27/1991 | US5043630 Electron gun with electron beam modulated by an optical device |
| 08/27/1991 | US5043629 Slotted dielectric-lined waveguide couplers and windows |
| 08/20/1991 | US5041801 Magnetron tuning systems |
| 08/14/1991 | EP0441569A2 Magnetrons |
| 08/07/1991 | EP0440530A1 Multiple-beam microwave tube with coaxial outlet |
| 08/07/1991 | EP0440529A1 Multiple-beam microwave tube with groups of adjacent cavities |
| 08/06/1991 | US5038077 Gyroklystron device having multi-slot bunching cavities |
| 08/06/1991 | US5038076 Radio frequency amplifier |
| 07/31/1991 | EP0438738A1 Quasi optical component for microwave radiation |
| 07/30/1991 | CA1287129C High gain miniature cross-field amplifier |
| 07/16/1991 | US5032949 High-voltage through-type ceramic capacitor |
| 07/16/1991 | US5032763 Trajectory correcting device for electron tubes |
| 07/09/1991 | US5030929 Compact waveguide converter apparatus |
| 07/03/1991 | CN1052748A Permatron catelectrode device and making technology |
| 07/02/1991 | US5029259 Microwave electron gun |
| 07/02/1991 | CA1285653C Magnetron device |
| 06/26/1991 | EP0433975A1 Circuit for electric power supply to a load such as a magnetron |
| 06/25/1991 | CA1285320C Switching helix power supply for a twt |
| 06/18/1991 | US5025193 Beam collector with low electrical leakage |
| 06/12/1991 | EP0432047A1 Wideband microwave window with miniaturized dimensions for electron tubes |
| 06/11/1991 | US5023743 Device for protecting a delay-line modulator |
| 06/05/1991 | EP0430461A2 Field emission devices |
| 06/04/1991 | US5021741 Cast charged particle drift tube |
| 06/04/1991 | US5021713 Magnetron |
| 06/04/1991 | US5021708 Cathode for emission of electrons and electron tube with a cathode of this type |
| 05/21/1991 | US5018180 Energy conversion using high charge density |
| 05/21/1991 | US5017881 Radio frequency accelerating cavity having slotted irises for damping certain electromagnetic modes |
| 05/15/1991 | EP0427482A2 Magnetrons |
| 05/15/1991 | EP0426855A1 Converter of higher-order wave of a round waveguide into a mirror-type transmission line wave |
| 05/14/1991 | US5015914 Couplers for extracting RF power from a gyrotron cavity directly into fundamental mode waveguide |
| 05/14/1991 | US5015908 Fast warm-up cathode for high power vacuum tubes |
| 05/08/1991 | EP0426130A2 Microwave oven magnetron having choking structure |
| 05/07/1991 | US5014014 Plane wave transformer linac structure |
| 04/23/1991 | US5010273 Agile magnetron with tuning motor with improved cooling |
| 04/10/1991 | EP0421716A2 Anode for a magnetron and method of manufacturing such an anode |
| 04/10/1991 | EP0290592B1 Method for securing a slow-wave structure in enveloping structure with crimped spacers |
| 04/09/1991 | US5006825 Coaxial line coupler with fluid cooled inner conductor |
| 04/02/1991 | USH909 Method of correcting eddy current magnetic fields in particle accelerator vacuum chambers |
| 04/02/1991 | US5004952 Vacuum-tight window for microwave electron tube and travelling wave tube including this window |
| 03/27/1991 | EP0144317B2 Grid structure for certain plural mode electron guns |
| 03/26/1991 | US5003223 Structure of anode of magnetron and a method of manufacturing the same |
| 03/20/1991 | EP0417455A1 Method of manufacturing magnetron anodes |
| 03/13/1991 | EP0416290A2 Travelling-wave tube with thermally conductive mechanical support |
| 03/13/1991 | EP0294401B1 Fast warm-up cathode arrangement |
| 03/12/1991 | US4999537 Structure of electron source and application thereof to electromagnetic wave emitting tubes |
| 02/21/1991 | DE3927478A1 Field varying tube and its manufacture - has interlaced projections with form groove for electron beam to pass along |
| 02/19/1991 | US4994709 Method for making a cathader with integral shadow grid |
| 02/06/1991 | EP0412001A1 Microwave tube comprising at least one axial part inserted at low temperature in a coaxial shell |
| 02/06/1991 | EP0411890A1 Gyrotron |
| 01/30/1991 | CN1048948A Quasi-optical gyrotron |
| 01/29/1991 | US4988956 High frequency oscillator |
| 01/16/1991 | EP0407558A1 Amplifier or oscillator device operating at ultrahigh frequency. |
| 01/15/1991 | US4985659 Travelling wave tube provided with an impervious coupling device between its delay line and an external microwave circuit |
| 01/09/1991 | EP0407252A1 Grid tube with a coupled-cavity output and the coupling element integrated within the tube |
| 12/27/1990 | EP0403811A1 Quasi-optical gyrotron |
| 12/19/1990 | EP0402549A1 Travelling-wave tube with a helical delay line made of boron nitride and attached to the vacuum tube |
| 12/19/1990 | CN1047937A Concentricity adjusting technology for cathode and anode of magnetron |
| 12/19/1990 | CN1010905B Tunable magnetron |
| 12/12/1990 | EP0401725A2 Element with periodic structure for application in the microwave field |
| 12/05/1990 | EP0401065A1 Method of construction of a helical delay line |
| 12/04/1990 | US4975652 Linear accelerator provided with self-focusing cavities having high electron capture efficiency in respect of moderate injection voltages |
| 11/20/1990 | US4971856 Microwave components with a surface coating which imparts a very high RF loss |
| 11/14/1990 | EP0397032A2 Method for manufacturing metal cylinder members of electron tubes and method for manufacturing magnetron anodes |
| 11/13/1990 | US4970432 Travelling wave tube with coupling device between its delay line and external microwave circuits |
| 11/06/1990 | US4968945 Open tube resonator test setup for conductivity measurements |
| 11/04/1990 | WO1990013905A1 Energy conversion using charge particles |
| 11/04/1990 | CA2054724A1 Energy conversion using charge particles |
| 10/31/1990 | DE3913538A1 Electron collector esp. for travelling wave tubes - has multiple electrode assembly within ceramic tube |
| 10/25/1990 | DE4012542A1 Hochfrequenz-verstaerkervorrichtung RF verstaerkervorrichtung |
| 10/25/1990 | DE3913064A1 Electronic collector for HF electronic beam tube - has in-line electrodes located within cylindrical tube of ceramic with outer metal sleeve |
| 10/25/1990 | DE3913063A1 Buckets for travelling-wave tubes - with power supplied by metallised coatings on walls of bores |
| 10/24/1990 | EP0394095A1 Travelling-wave tube provided with a bimetallic helix delay line structure |
| 10/24/1990 | EP0394094A1 Travelling-wave tube provided with a brazed helix delay line structure |
| 10/18/1990 | WO1990012414A1 Circuit for driving magnetron |
| 10/03/1990 | EP0390474A2 Klystron amplifier |
| 10/03/1990 | CN1009875B Penetrating center type condenser and magnetron adopted this kind condenser |
| 09/30/1990 | CA2013366A1 Klystron with reduced length |
| 09/26/1990 | EP0389270A2 Electron gun with integral shadow grid |
| 09/26/1990 | EP0389047A2 High frequency high voltage power supply with controlled output power |
| 09/22/1990 | CA2012708A1 Electron gun with integral shadow grid |
| 09/18/1990 | US4957463 Method of making a long life high current density cathode from tungsten and iridium powders using a quaternary compound as the impregnant |
| 09/12/1990 | EP0387145A1 Electron beam generator and electronic devices using such a generator |
| 08/30/1990 | DE3906028A1 Method for producing a vacuum jacket (cover, envelope) and vacuum jacket produced using this method |
| 08/29/1990 | EP0384813A1 Electron gun with a beam modulated by an optical device |
| 08/28/1990 | US4951380 Waveguide structures and methods of manufacture for traveling wave tubes |
| 08/14/1990 | US4949011 Klystron with reduced length |
| 08/07/1990 | US4947467 Traveling-wave tube slow-wave structure with integral conductively-loaded barrel and method of making same |
| 08/01/1990 | EP0380205A1 Fast warm-up cathode for high power vacuum tubes |
| 07/28/1990 | WO1990009029A1 Amplifier or oscillator device operating at ultrahigh frequency |
| 07/25/1990 | EP0379403A1 Electron gun comprising a device producing a magnetic field in the proximity of the cathode |
| 07/25/1990 | EP0378583A1 Microwave tube with directional coupling of an input locking signal |
| 07/23/1990 | CA2008295A1 Fast warm-up cathode for high power vacuum tubes |
| 07/17/1990 | US4942336 Traveling-wave tube with confined-flow periodic permanent magnet focusing |