Inventor
UMEHARA HIDEKI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “UMEHARA HIDEKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI TOATSU CHEMICALS
9 patentsUS5696758ADec 9, 1997
Optical recording media
MITSUI TOATSU CHEMICALS78 citations94
US5633106AMay 27, 1997
Optical recording media and a method of recording and reproducing information
MITSUI TOATSU CHEMICALS62 citations94
US5492744AFeb 20, 1996
Optical information recording medium and composition for optical information recording film
MITSUI TOATSU CHEMICALS20 citations92
US5446142AAug 29, 1995
Phthalocyanine and naphthalocyanine light-absorbing compound and optical recording medium containing same
MITSUI TOATSU CHEMICALS17 citations73
US5658707AAug 19, 1997
Optical recording media
MITSUI TOATSU CHEMICALS10 citations72
US5188898AFeb 23, 1993
Ferromagnetic metal particles and preparation process thereof
MITSUI TOATSU CHEMICALS12 citations69
US5672462ASep 30, 1997
Optical recording medium
MITSUI TOATSU CHEMICALS6 citations63
US5750229AMay 12, 1998
Phthalocyanine compound and optical recording medium containing it
MITSUI TOATSU CHEMICALS5 citations62
US5646273AJul 8, 1997
Phthalocyanine compound and optical recording medium containing it
MITSUI TOATSU CHEMICALS5 citations62
MITSUI CHEMICALS INC
5 patentsUS5948593ASep 7, 1999
Optical recording medium
MITSUI CHEMICALS INC36 citations92
US5855979AJan 5, 1999
Optical recording medium
MITSUI CHEMICALS INC48 citations91
US5876820AMar 2, 1999
Optical information recording medium and composition for optical information recording film
MITSUI CHEMICALS INC13 citations81
USRE38979EFeb 14, 2006
Optical information recording medium and composition for optical information recording film
MITSUI CHEMICALS INC2 citations62
US6060606AMay 9, 2000
Dipyrromethene metal chelate compounds
MITSUI CHEMICALS INC4 citations62