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Class Information
Number: 313/447
Name: Electric lamp and discharge devices > Cathode ray tube > Ray generating or control > Including cathode assembly > With control grid adjacent cathode
Description: Subject matter including an electrode located immediately adjacent the cathode for regulating the velocity of an electron or electron beam density.










Sub-classes under this class:

Class Number Class Name Patents
313/448 With anode 50


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8330345 Active electronically steered cathode emission Dec. 11, 2012
8144078 Enhanced brightness, color and contrast control for cathode ray tube monitor Mar. 27, 2012
8027433 Method of fast current modulation in an X-ray tube and apparatus for implementing same Sep. 27, 2011
7327077 Electron tube control grid Feb. 5, 2008
7312564 Cathode ray tube having an electron gun Dec. 25, 2007
7268478 Electron gun assembly and cathode ray tube with the same Sep. 11, 2007
7122977 Cathode-ray tube apparatus Oct. 17, 2006
6943491 Picture tube device having lead electrode with a curved shape Sep. 13, 2005
6891321 Oil-free electron source having cathode and anode members adjustable with five degrees of freedom May. 10, 2005
6885152 Multilayer field emission klystron Apr. 26, 2005
6855945 Electrically conductive synthetic diamond apertures for electron and other particulate beam systems Feb. 15, 2005
6847158 Electrode structure for electron gun Jan. 25, 2005
6841924 Low-voltage high-resolution einzel gun Jan. 11, 2005
6828717 Electron gun having short length and cathode-ray tube apparatus using such electron gun Dec. 7, 2004
6815913 Cathode ray tube Nov. 9, 2004
6815881 Color CRT electron gun with progressively reduced electron beam passing aperture size Nov. 9, 2004
6664720 Temperature compensated gun Dec. 16, 2003
6661166 Electron gun and cathode-ray tube Dec. 9, 2003
6617778 Electron gun assembly for a color cathode ray tube Sep. 9, 2003
6614158 Electron gun arrangements having closely spaced cathode and electrode and a vacuum seal Sep. 2, 2003
6614159 Electron gun for cathode ray tube Sep. 2, 2003
6573649 Color picture tube Jun. 3, 2003
6555952 Electron gun and cathode ray tube using the same Apr. 29, 2003
6538397 Color cathode-ray tube apparatus Mar. 25, 2003
6538370 Cathode-ray tube and electron gun having reduced radiation Mar. 25, 2003
6531813 Cathode ray tube having an improved cathode structure Mar. 11, 2003
6525459 CRT beam landing spot size correction apparatus and method Feb. 25, 2003
6476546 Electron gun for color cathode ray tube having different materials for different electrodes Nov. 5, 2002
6469433 Package structure for mounting a field emitting device in an electron gun Oct. 22, 2002
6414424 Electron gun, color cathode ray tube, and display apparatus using same Jul. 2, 2002
6407491 Color cathode-ray tube having a dynamic focus voltage Jun. 18, 2002
6380803 Linear amplifier having discrete resonant circuit elements and providing near-constant efficiency across a wide range of output power Apr. 30, 2002
6377003 Multi-beam group electron gun for beam index CRT Apr. 23, 2002
6373182 Mounting for cathode in an electron gun Apr. 16, 2002
6369499 Electron gun with improved cathode venting Apr. 9, 2002
6366011 ELECTRON GUN FOR CATHODE-RAY TUBE FOR IMAGE DISPLAY HAVING AN ELECTRODE WITH REDUCED ELECTRON BEAM PASSAGE HOLE AND A CATHODE WITH AN ELECTRON EMISSIVE LAYER MAINLY MADE OF AN OXIDE OF AN ALKA Apr. 2, 2002
6353281 Cathode ray tube Mar. 5, 2002
6310434 Picture display device having an improved bandwidth Oct. 30, 2001
6304033 Electron beam tube having a DC power lead with a damping structure Oct. 16, 2001
6297584 Precision alignment of microcolumn tip to a micron-size extractor aperture Oct. 2, 2001
6265819 Electron gun structure Jul. 24, 2001
6236154 Electron tube with a cesium source May. 22, 2001
6232711 Color cathode ray tube May. 15, 2001
6215238 Cathode ray tube, electron gun for a cathode ray tube, method for manufacturing an electron gun, parts used in method for manufacturing an electron gun Apr. 10, 2001
6184617 Electron guns for precluding distortion of beam spots Feb. 6, 2001
6166485 Electron gun with heat dissipation elements Dec. 26, 2000
6133786 Low impedance grid-anode interaction region for an inductive output amplifier Oct. 17, 2000
6124667 Electron gun for a cathode-ray tube for image display having an electrode with a reduced electron beam limiting hole and a cathode with an electron emissive layer mainly made of an oxide of an Sep. 26, 2000
6072271 Inline electron gun having improved beam forming region Jun. 6, 2000
5990608 Electron gun having a cathode with limited electron discharge region Nov. 23, 1999

1 2 3










 
 
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