Inventor
NAKASHIMA TSUTOMU
JP15 patents
⚠️ This page may combine multiple inventors who share the name “NAKASHIMA TSUTOMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
13 patentsUS7255444B2Aug 14, 2007
Optical unit and projection-type image display apparatus using the same
HITACHI LTD22 citations92
US6910773B2Jun 28, 2005
Projection type image display apparatus
HITACHI LTD41 citations92
US6854851B2Feb 15, 2005
Projection display
HITACHI LTD51 citations92
US7066600B2Jun 27, 2006
Projection type image display apparatus
HITACHI LTD15 citations84
US6893131B2May 17, 2005
Projection type image display apparatus
HITACHI LTD12 citations84
US7241015B2Jul 10, 2007
Optical unit and projection type image display unit using it
HITACHI LTD3 citations63
US7246907B2Jul 24, 2007
Projection type image display apparatus using reflective image display elements, reflective polarizing plates and auxiliary analyzers
HITACHI LTD1 citations62
US7222965B2May 29, 2007
Optical unit and a projection image display apparatus using the same
HITACHI LTD3 citations62
US7090351B2Aug 15, 2006
Projection type image display apparatus
HITACHI LTD2 citations62
US7092056B2Aug 15, 2006
Quarter wavelength plate and projection type video display device using the same
HITACHI LTD2 citations62
US6982772B2Jan 3, 2006
Quarter wavelength plate and projection type video display device using same
HITACHI LTD2 citations62
US7237901B2Jul 3, 2007
Projection type image display device, rear projection type image display device, optical unit, and screen unit
HITACHI LTD1 citations52
US7210797B2May 1, 2007
Projector optical unit, projection type image display apparatus, and rear projection type image display apparatus
HITACHI LTD1 citations52