Inventor
KOSAKA MASAHISA
JP16 patents
Patents
16 patentsUS5961889AOct 5, 1999
Process of producing polythiol oligomer
HOYA CORP64 citations96
US4975328ADec 4, 1990
Process for producing polyurethane lens
HOYA CORP61 citations95
US5181141AJan 19, 1993
Anti-reflection optical element
HOYA CORP74 citations94
US6673888B2Jan 6, 2004
Optical materials having good ultraviolet absorbability and method for producing them
HOYA CORP13 citations92
US6441119B1Aug 27, 2002
Optical materials having good ultraviolet absorbability and method for producing them
HOYA CORP34 citations92
US5744568AApr 28, 1998
Process for the production of polyurethane lens
HOYA CORP17 citations91
US5294666AMar 15, 1994
Polymer for optical products and process for preparation thereof
HOYA CORP20 citations91
US7261845B2Aug 28, 2007
Plastic lens and process for preparing the lens
HOYA CORP16 citations83
US6448304B1Sep 10, 2002
Optical materials having good ultraviolet absorbability and method for producing them
HOYA CORP18 citations83
US7009025B2Mar 7, 2006
Optical materials having good ultraviolet absorbability and method for producing them
HOYA CORP4 citations73
US6274694B1Aug 14, 2001
Process for the production of polyurethane lens
HOYA CORP12 citations72
US5635580AJun 3, 1997
Process for the production of polyurethane lens
HOYA CORP9 citations72
US7101953B2Sep 5, 2006
Process for producing plastic lens and plastic lens
HOYA CORP5 citations62
US7001974B2Feb 21, 2006
Process for producing plastic lens and plastic lens
HOYA CORP2 citations62
US6743886B2Jun 1, 2004
Plastic lenses for spectacles
HOYA CORP3 citations62
US7091301B2Aug 15, 2006
Plastic lenses for spectacles
HOYA CORP1 citations51