| Patents for H01J 23 - Details of transit-time tubes of the types covered by group (3,921) |
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| 06/07/1994 | US5319340 Bi-chambered magnetic igloo |
| 06/04/1994 | CA2102340A1 Highly depressed, high thermal capacity, conduction cooled collector |
| 05/31/1994 | US5317234 Mode trap for absorbing transverse modes of an accelerated electron beam |
| 05/31/1994 | US5317233 Vacuum tube including grid-cathode assembly with resonant slow-wave structure |
| 05/24/1994 | US5315210 Klystron resonant cavity operating in TM01X mode, where X is greater than zero |
| 05/19/1994 | DE4238199A1 Stabilised heating voltage supply arrangement for mains-fed magnetrons - has switching frequency varied to compensate for voltage variation dependent on magnetron anode current. |
| 05/19/1994 | DE4238198A1 Magnetron switch-mode power supply circuit, e.g. for microwave oven - controls rectifier so that only one magnetron is driven by mains power at any time |
| 05/18/1994 | EP0597366A1 Elektron tube |
| 05/17/1994 | US5313139 Condenser unit for a magnetron capable of preventing the leakage of microwave energy |
| 05/17/1994 | US5313138 Electron gun modulated by optoelectronic switching |
| 05/11/1994 | WO1994010699A1 Method of increasing and/or ensuring the efficiency of a gyrotron, and a gyrotron designed to carry out the method |
| 05/04/1994 | EP0595622A2 A traveling wave tube loss button |
| 05/04/1994 | EP0595621A1 Bonding thermally-mismatched elements |
| 05/04/1994 | EP0594832A1 Tm01x mode (x 0) klystron resonant cavity |
| 04/27/1994 | EP0593768A1 Magnetron |
| 04/19/1994 | US5304942 Extended interaction output circuit for a broad band relativistic klystron |
| 04/13/1994 | EP0591579A1 Cooled coupled-actovity TWT circuit |
| 04/12/1994 | US5302881 High energy cathode device with elongated operating cycle time |
| 04/07/1994 | DE4233352A1 Travelling wave tube - has heat pipes parallel to longitudinal axis, for transferring heat from collector region to delay line region |
| 04/05/1994 | US5300901 Arrangement for coupling in of microwave energy |
| 03/31/1994 | DE4232265A1 Coating electrically insulated substrate, esp. ceramic - by thermally depositing with solid crystalline carbon in gas phase |
| 03/31/1994 | DE4231962A1 Microwave-absorbing component for shielding applications |
| 03/30/1994 | EP0589606A2 Electron gun arrangements |
| 03/30/1994 | EP0589019A1 Magnetron |
| 03/29/1994 | US5298873 Adjustable resonator arrangement |
| 03/15/1994 | US5294864 Magnetron for microwave oven |
| 03/09/1994 | CN2158576Y Resonator for eliminating the loss of vibration from progressive wave tube |
| 03/09/1994 | CN2158575Y Cathode of carcinotron of millimeter wave |
| 02/09/1994 | CN2155624Y High-band millimeter-wave energy coupling device |
| 02/09/1994 | CN2155130Y Electronic device for preserving fresh flowers |
| 02/03/1994 | DE4325340A1 Filamentary coil cathode support for magnetron - electrically connects and supports upper parallel molybdenum support rods with lower rods passing though ceramic holder using respective flat and double-right-angled S=shaped metal plates |
| 02/01/1994 | US5283534 High frequency amplifying apparatus with a collector which has a periodic amplitude variable longitudinal magnetic field therein |
| 01/27/1994 | DE4323777A1 Collector for electrons generated by electron gun - has cylindrical tapered collection stage with input via cone shaped repulsion electrode coupled to voltage supply |
| 01/25/1994 | US5281895 Tuning mechanism for high power klystron having photointerrupter control means |
| 01/25/1994 | US5281894 For producing a flow of electrons |
| 01/22/1994 | CA2100931A1 Collector ion expeller |
| 01/18/1994 | US5280218 Electrodes with primary and secondary emitters for use in cross-field tubes |
| 01/18/1994 | US5280216 Mode converter and power splitter for microwave tubes |
| 01/12/1994 | EP0578525A1 Electron gun with reduced heating of grid |
| 12/28/1993 | US5274304 Helix type traveling wave tube structure with supporting rods covered with boron nitride or artificial diamond |
| 12/14/1993 | CA2054468C Spatial fastening device |
| 12/08/1993 | CN1079335A Electron beam device |
| 11/30/1993 | US5266868 Gyrotron including quasi-optical mode converter |
| 11/25/1993 | WO1993023867A1 Tm01x mode (x>0) klystron resonant cavity |
| 11/17/1993 | CN1078593A Unnecessary electromagnetic wave shielding structure of a magnetron for a microwabe oven |
| 11/09/1993 | US5260623 Electron collector for an electron beam tube |
| 10/28/1993 | WO1993021648A1 Magnetron |
| 10/28/1993 | WO1993021647A1 Magnetron |
| 10/14/1993 | DE4211756A1 Electron beam tube for travelling wave tube or klystron - has electrode surrounding indentation and base section supporting indentation forming final collector stage |
| 10/06/1993 | EP0563543A1 Electron beam device |
| 10/06/1993 | CN1077054A Getter structure of magnetron |
| 10/05/1993 | US5250774 Power supply circuit for driving magnetron |
| 09/07/1993 | US5243163 Electrical supply circuit for a load such as a magnetron |
| 09/01/1993 | CN1075827A Device for coupling microwave energy |
| 08/25/1993 | EP0557177A1 Microwave tube with lightened focussing arrangement |
| 08/24/1993 | US5239272 Electron beam tube arrangements having primary and secondary output cavities |
| 08/24/1993 | US5239235 Multiple-beam microwave tube with coaxial output and coaxial collector |
| 08/11/1993 | EP0554949A1 Multistage collector for electron beam tubes |
| 08/11/1993 | EP0554835A1 Magnetron device |
| 08/11/1993 | CN1075232A Anode assembly for a magnetron |
| 08/11/1993 | CN1075212A Launcher for waveguide system |
| 08/10/1993 | US5235251 Hydraulic fluid cooling of high power microwave plasma tubes |
| 08/10/1993 | US5235249 Multiple-beam microwave tube with groups of adjacent cavities |
| 08/03/1993 | US5233269 Vacuum tube with an electron beam that is current and velocity-modulated |
| 07/28/1993 | CN1074797A Fixing device for antenna feed line of magnetron |
| 07/27/1993 | US5231330 Digital helix for a traveling-wave tube and process for fabrication |
| 07/27/1993 | US5231073 Microwave/far infrared cavities and waveguides using high temperature superconductors |
| 07/21/1993 | CN1074553A Method of manufacturing a Filter section of a magnetron |
| 07/13/1993 | US5227694 Collector apparatus for an electron beam |
| 07/07/1993 | CN1074061A Magnetron for microwave oven |
| 07/06/1993 | US5225739 Klystron with cavities arranged in different blocks for providing widened instantaneous passband |
| 06/30/1993 | CN1073802A Vane and strap ring ring assembly of a magnetron |
| 06/09/1993 | EP0545603A1 Cathode heater and cathode assembly for microwave power tubes |
| 06/01/1993 | US5216327 Magnetron coaxial adaptor having a cap which fits over the magnetron output antenna |
| 05/26/1993 | EP0543687A1 Magnetron for microwave oven |
| 05/26/1993 | CN1020987C Quasi-optical gyrotron |
| 05/13/1993 | WO1993009593A1 Amplifying tubes heated by transformed a.c. |
| 05/13/1993 | DE4136879A1 Ueber einen transformator mit wechselstrom heizbare roehre Over a transformer with ac heated roehre |
| 05/11/1993 | US5210465 Magnetron having an tm01 output coupling probe passing through a coupling iris |
| 05/11/1993 | US5210464 Cavity resonance absorption in ultra-high bandwidth CRT deflection structure by a resistive load |
| 05/05/1993 | EP0540384A1 Cooling arrangement for a microwave tube |
| 05/04/1993 | US5208432 Magnetron driving power supply circuit |
| 04/29/1993 | WO1993008586A1 Microwave-absorbing component, and the use of such a component |
| 04/21/1993 | CN1071289A RF radiation absorbing material |
| 03/31/1993 | EP0534762A1 Dielectric support rod for a traveling-wave tube |
| 03/23/1993 | US5196765 High RF isolation crossed-field amplifier |
| 03/23/1993 | US5195710 Three-dimensional fixing device |
| 03/18/1993 | DE4130495A1 Compensator for modulation interference caused by travelling field tube noise components - has heating current noise component sensor in tube heating circuit connected to a resistor in cathode tube connector. |
| 03/16/1993 | US5194833 Airbridge compensated microwave conductors |
| 03/02/1993 | US5191417 Compatible EDTV system providing multi-aspect ratio display on EDTV and conventional television receivers |
| 02/23/1993 | US5188717 Uniformity |
| 02/17/1993 | EP0527327A1 Microwave tube collector assembly |
| 02/17/1993 | EP0522153A4 Gyrotron with radial beam extraction |
| 02/16/1993 | US5187409 Gyrotron having a quasi-optical mode converter |
| 02/16/1993 | US5187408 Quasi-optical component and gyrotron having undesired microwave radiation absorbing means |
| 02/03/1993 | EP0525322A1 Surface coating technique for loss in RF structures |
| 02/02/1993 | US5184045 Magnetron for a microwave oven having a pair of choke coils wound around a core in the same directions |
| 01/26/1993 | US5182493 Rising sun magnetron with planar tuning member protruding into only one set of cavities |
| 01/19/1993 | US5180946 Magnetron having coaxial choke means extending into the output side insulating tube space |
| 01/19/1993 | US5180944 Gyrotron with a mode convertor which reduces em wave leakage |