Inventor
SHIRAI SHOJI
JP57 patents
⚠️ This page may combine multiple inventors who share the name “SHIRAI SHOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
49 patentsUS5610481AMar 11, 1997
Cathode ray tube with low dynamic correction voltage
HITACHI LTD23 citations93
US5414323AMay 9, 1995
In-line type electron gun assembly including electrode units having electron beam passage holes of different sizes for forming an electrostatic lens
HITACHI LTD21 citations92
US5146133ASep 8, 1992
Electron gun for color cathode ray tube
HITACHI LTD24 citations92
US4581560AApr 8, 1986
Electron gun for color picture tube
HITACHI LTD39 citations92
US5015910AMay 14, 1991
Electron gun for color picture tube
HITACHI LTD24 citations91
US4599534AJul 8, 1986
Electron gun for color picture tube
HITACHI LTD27 citations91
US6031346AFeb 29, 2000
Cathode ray tube with low dynamic correction voltage
HITACHI LTD12 citations82
US5828191AOct 27, 1998
Cathode ray tube with low dynamic correction voltage
HITACHI LTD12 citations82
US4461978AJul 24, 1984
Method of driving gas discharge light-emitting devices
HITACHI LTD23 citations82
US5739631AApr 14, 1998
Color cathode ray tube having a low dynamic focus voltage
HITACHI LTD12 citations81
US5608284AMar 4, 1997
Color cathode ray tube having a low dynamic focus voltage
HITACHI LTD14 citations81
US4851741AJul 25, 1989
Electron gun for color picture tube
HITACHI LTD22 citations81
US6633142B1Oct 14, 2003
Cathode ray tube with low dynamic correction voltage
HITACHI LTD4 citations74
US6445116B1Sep 3, 2002
Color cathode ray tube having an improved electron gun
HITACHI LTD5 citations74
US5942844AAug 24, 1999
Color cathode ray tube having a small neck diameter
HITACHI LTD7 citations74
US5932958AAug 3, 1999
Color cathode ray tube having beam passageways with barrel-like segment
HITACHI LTD12 citations74
US5625252AApr 29, 1997
Main lens structure for a color cathode ray tube
HITACHI LTD12 citations74
US6583547B1Jun 24, 2003
Cathode ray tube with UPF type electron gun having particular electrode structure and spacing
HITACHI LTD7 citations73
US6353282B1Mar 5, 2002
Color cathode ray tube having a low dynamic focus
HITACHI LTD6 citations73
US6329747B1Dec 11, 2001
Cathode ray tube having an overall length thereof shortened
HITACHI LTD9 citations73
US6304026B1Oct 16, 2001
Wide-angle deflection color cathode ray tube with a reduced dynamic focus voltage
HITACHI LTD7 citations73
US6225765B1May 1, 2001
Color cathode ray tube with a reduced dynamic focus voltage for an electrostatic quadrupole lens thereof
HITACHI LTD8 citations73
US6051919AApr 18, 2000
Color cathode ray tube with electrostatic quadrupole lens
HITACHI LTD7 citations73
US6025674AFeb 15, 2000
Color cathode ray tube having a low dynamic focus voltage
HITACHI LTD9 citations73
US5739630AApr 14, 1998
Color cathode ray tube
HITACHI LTD8 citations73
US4833365AMay 23, 1989
Electron gun structure for converging electron beams
HITACHI LTD12 citations73
US6472808B1Oct 29, 2002
Color cathode ray tube having electrostatic quadrupole lenses
HITACHI LTD10 citations72
US6133683AOct 17, 2000
Color cathode ray tube having an internal voltage divider
HITACHI LTD8 citations72
US5909080AJun 1, 1999
Color cathode ray tube having a small neck diameter
HITACHI LTD7 citations72
US5710480AJan 20, 1998
Color cathode ray tube having a small neck diameter
HITACHI LTD5 citations72
US5466983ANov 14, 1995
Cathode ray tube with improved resolution
HITACHI LTD14 citations72
US4833364AMay 23, 1989
Electron gun for color picture tubes having uniquely formed lens apertures
HITACHI LTD13 citations72
US5606216AFeb 25, 1997
Color cathode-ray tube with reduced moire
HITACHI LTD9 citations71
US6919675B2Jul 19, 2005
Color cathode ray tube
HITACHI LTD3 citations63
US6624562B2Sep 23, 2003
Color cathode ray tube having an improved electron gun
HITACHI LTD3 citations63
US6407491B1Jun 18, 2002
Color cathode-ray tube having a dynamic focus voltage
HITACHI LTD5 citations63
US6255788B1Jul 3, 2001
Cathode ray tube with low dynamic correction voltage
HITACHI LTD3 citations63
US6111350AAug 29, 2000
Color cathode ray tube having an improved electron gun
HITACHI LTD3 citations63
US5861710AJan 19, 1999
Color cathode ray tube with reduced moire
HITACHI LTD4 citations63
US4965489AOct 23, 1990
Electron gun for cathode-ray tube
HITACHI LTD3 citations63
US4760308AJul 26, 1988
Electron gun for color picture tubes
HITACHI LTD3 citations63
US6507143B2Jan 14, 2003
Cathode ray tube including an electron gun having specific relation between axial length of focus electrode and lens-screen distance
HITACHI LTD4 citations62
US6339300B2Jan 15, 2002
Color cathode ray tube with a reduced dynamic focus voltage for an electrostatic quadrupole lens thereof
HITACHI LTD4 citations62
US6331752B1Dec 18, 2001
Color cathode ray tube having a low dynamic focus voltage
HITACHI LTD2 citations62
US6313576B1Nov 6, 2001
Color cathode ray tube
HITACHI LTD1 citations62
US6847159B2Jan 25, 2005
Projection tube having different neck diameters
HITACHI LTD3 citations61
US6448704B1Sep 10, 2002
Color cathode ray tube having a small neck diameter
HITACHI LTD1 citations61
US6097143AAug 1, 2000
Color cathode ray tube having a small neck diameter
HITACHI LTD1 citations61
US5847502ADec 8, 1998
Color cathode ray tube having a small neck diameter
HITACHI LTD3 citations61
BUILMATEL CO LTD
1 patentShowing the top 50 of 57 patents by PatentIndex Score.