| Patents for H01J 23 - Details of transit-time tubes of the types covered by group (3,921) |
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| 03/27/2003 | US20030057838 Display system having selectable automatic crt cutoff stabilization or akb with crt feedback current simulation |
| 03/25/2003 | US6538386 Forming photoresist layer around outer surface of cylindrical core, patterning and etching to form vanes extending radially from outer surface to define plurality of slots, plating core and vanes, removing to form cylindrical anode with slots |
| 03/25/2003 | US6538367 Field emitting device comprising field-concentrating nanoconductor assembly and method for making the same |
| 03/20/2003 | US20030052612 Microminiature microwave electron source |
| 03/19/2003 | EP1131839B1 Ceramic electron collector assembly having metal sleeve for high temperature operation |
| 03/19/2003 | EP0764391B1 High temperature superconductor dielectric slow wave structures for accelerators and traveling wave tubes |
| 03/19/2003 | CN1404093A 磁控管 Magnetron |
| 03/19/2003 | CN1404092A 磁控管 Magnetron |
| 03/13/2003 | WO2003021625A1 Carbonized resin coated anode |
| 03/13/2003 | WO2002103904A3 High voltage switching apparatus |
| 03/12/2003 | CN1103025C Microwave oven equipped with structurally simple apparatus for generating microwave frequency energy |
| 03/06/2003 | WO2002086936B1 Linear beam sevices with a gridded electron gun |
| 03/06/2003 | US20030042836 Carbonized resin coated anode |
| 02/27/2003 | US20030038603 Electron gun |
| 02/26/2003 | EP1286379A2 Magnetron |
| 02/26/2003 | EP1285451A1 Manufacture of field emitters for a magnetron |
| 02/25/2003 | US6525477 Optical magnetron generator |
| 02/20/2003 | WO2003015264A1 Device for amplifying a high frequency signal |
| 02/18/2003 | US6522080 Field emitter array with enhanced performance |
| 02/13/2003 | US20030030390 Broadband, inverted slot mode, coupled cavity circuit |
| 02/12/2003 | CN1397084A 集电器 Collector |
| 01/30/2003 | US20030020410 Beam-index-type cathode ray tube |
| 01/28/2003 | US6512339 CRT display device |
| 01/23/2003 | US20030016421 Wireless communication system with high efficiency/high power optical source |
| 01/22/2003 | CN1099689C Grid electron gun |
| 01/21/2003 | US6510038 High-voltage feedthrough capacitor |
| 01/21/2003 | US6509808 High thermal conductivity lossy dielectric using a multi layer configuration |
| 01/21/2003 | CA2099813C X-z geometry periodic permanent magnet focusing system |
| 01/16/2003 | WO2001057903A9 Input circuit for rf amplifier |
| 01/15/2003 | EP1068627B1 Inductive output amplifier output cavity structure |
| 01/15/2003 | CN1391250A Electron gun for cathode ray tube |
| 01/15/2003 | CN1099125C Impregnated cathode structure, cathode substrat used for structure, electron gun structure using cathode structure, and electron tube |
| 01/08/2003 | EP1273023A1 Magnetrons |
| 01/08/2003 | CN1389890A Ternary RE-Mo secondary emitting material and its prepn. |
| 01/07/2003 | US6504304 Magnetron |
| 01/07/2003 | US6504303 Optical magnetron for high efficiency production of optical radiation, and 1/2λ induced pi-mode operation |
| 01/07/2003 | US6504292 Field emitting device comprising metallized nanostructures and method for making the same |
| 01/02/2003 | US20030001528 Ion implanting system |
| 01/01/2003 | CN1388557A 磁控管 Magnetron |
| 12/31/2002 | US6501224 Magnetron having magnetic pole pieces providing a specific magnetic flux to thickness ratio |
| 12/27/2002 | WO2002103904A2 High voltage switching apparatus |
| 12/26/2002 | US20020195944 Electron gun assembly for cathode ray tube |
| 12/25/2002 | CN1387226A 磁控管 Magnetron |
| 12/19/2002 | US20020193038 Field emitter for microwave devices and the method of its production |
| 12/19/2002 | US20020190656 Optical magnetron generator |
| 12/18/2002 | EP1266390A1 Grooved multi-stage depressed collector for secondary electron suppression |
| 12/17/2002 | US6495953 Cold cathode electron gun |
| 12/12/2002 | WO2002099835A2 Cathode ray tube having multiple field emission cathrodes |
| 12/11/2002 | EP1264326A2 Input circuit for rf amplifier |
| 12/05/2002 | US20020180363 Magnetron |
| 12/05/2002 | US20020180362 Inductive output tube with multi-staged depressed collector having improved efficiency |
| 12/05/2002 | US20020180360 Cathode ray tube having multiple field emission cathodes |
| 12/04/2002 | EP1263016A2 Magnetron |
| 12/04/2002 | CN1383572A Optical magnetron for effectively generating light emission and 1/2 lambda initiated magnetron oscillating mode work |
| 11/28/2002 | US20020175627 Magnetron and microwave heating device |
| 11/27/2002 | EP1261015A2 Magnetron and microwave oven |
| 11/27/2002 | EP1259973A1 Transducer with field emitter array |
| 11/27/2002 | CN1381865A Cathode-ray tube display device |
| 11/26/2002 | US6486605 Multibeam electronic tube with magnetic field for correcting beam trajectory |
| 11/26/2002 | US6486604 Traveling-wave valve arrangement |
| 11/26/2002 | US6485346 Field emitter for microwave devices and the method of its production |
| 11/21/2002 | DE10105441C1 Kollektorwand und Kollektorspulengruppe eines Gyrotrons Wall collector and collector coil group a gyrotron |
| 11/19/2002 | US6483243 Multiband travelling wave tube of reduced length capable of high power functioning |
| 11/19/2002 | US6483242 Traveling wave tube system with output waveguide-coupler termination |
| 11/14/2002 | US20020167276 Traveling wave tube and method of manufacture |
| 11/05/2002 | US6476558 Mode converter and gyrotron tube provided with mode converter for converting mode of millimeter waves |
| 10/31/2002 | WO2002086936A1 Linear beam sevices with a gridded electron gun |
| 10/30/2002 | EP1252645A2 Collector |
| 10/30/2002 | CN1377513A High frequency apparatus |
| 10/30/2002 | CN1376818A Copper-net knitting method for microwave shielding cushion ring |
| 10/30/2002 | CN1093685C Electron tube holding pole |
| 10/24/2002 | US20020153841 CRT display device |
| 10/24/2002 | US20020153818 Temperature compensated gun |
| 10/24/2002 | DE10114022C1 Microwave oven comprises a cylindrical hollow chamber, a gas discharge vessel arranged longitudinal and parallel to a longitudinal edge, and a device which reflects microwaves |
| 10/23/2002 | EP1251544A1 Microwave amplifier electron tube with miniature entry plug and method of fabrication |
| 10/16/2002 | EP1249030A2 Magnetron anodes |
| 10/15/2002 | US6465958 Electron beam tubes |
| 10/15/2002 | CA2267710C Low impedance grid-anode interaction region for an inductive output amplifier |
| 10/09/2002 | CN1373492A Process for preparing diamond rod of travelling-wave tube |
| 10/08/2002 | US6462474 Grooved multi-stage depressed collector for secondary electron suppression |
| 10/03/2002 | WO2001057903A3 Input circuit for rf amplifier |
| 10/03/2002 | US20020140356 Optical magnetron for high efficiency production of optical radiation |
| 10/02/2002 | EP1245035A2 Production of a microwave device by applying a coating of yttrium-iron-garnet to the surface of the device to suppress secondary electron emission |
| 10/01/2002 | CA2254677C Apparatus for sputtering or arc evaporation |
| 09/24/2002 | US6456092 Network vector channel analyzer |
| 09/24/2002 | US6456009 Adaptive heater voltage algorithm and control system for setting and maintenance of the heater voltage of a vacuum electron device |
| 09/19/2002 | DE10111817A1 Vorrichtung zur Erzeugung von Mikrowellen hoher Frequenz Device for generating microwaves of high frequency |
| 09/18/2002 | EP1131874B1 Load protection system in a power modulator |
| 09/17/2002 | US6452335 Field emission type cold-cathode electron gun with focusing electrode |
| 09/12/2002 | WO2002071435A1 Device for producing high frequency microwaves |
| 09/12/2002 | US20020125841 Robust pierce gun |
| 09/12/2002 | US20020125827 Magnetron with diamond coated cathode |
| 09/11/2002 | CN1368837A Lighting device using microwave |
| 09/10/2002 | US6447355 Impregnated-type cathode substrate with large particle diameter low porosity region and small particle diameter high porosity region |
| 09/03/2002 | US6445596 Magnetron drive power supply |
| 08/29/2002 | WO2000054305A9 Laser-assisted field emission microwave signal generator |
| 08/22/2002 | WO2002065504A1 Magnetron |
| 08/20/2002 | US6437511 Magnetron having choke structures with a gap spacing therebetween |
| 08/20/2002 | US6437510 Crossed-field amplifier with multipactor suppression |
| 08/15/2002 | WO2002063652A1 Collector wall and collector coil group for a gyrotron |