Inventor
YAMAGA KENJI
JP47 patents
⚠️ This page may combine multiple inventors who share the name “YAMAGA KENJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TDK CORP
27 patentsUS7044726B2May 16, 2006
Mold component and mold assembly
TDK CORP16 citations82
US5648105AJul 15, 1997
Apparatus for making a plurality of optical record disc subtrates
TDK CORP16 citations80
US6898796B2May 24, 2005
Optical information medium and making method
TDK CORP10 citations74
US5458821AOct 17, 1995
Method of making a plurality of optical record disc substrates
TDK CORP9 citations71
US7502309B2Mar 10, 2009
Optical recording medium having a relationship between convex width and track pitch
TDK CORP2 citations63
US7283457B2Oct 16, 2007
Optical recording medium and method of evaluating optical recording medium
TDK CORP2 citations63
US7125593B2Oct 24, 2006
Optical recording medium
TDK CORP2 citations63
US7055162B2May 30, 2006
Optical information medium and making method
TDK CORP2 citations63
US7018697B2Mar 28, 2006
Optical recording medium
TDK CORP5 citations63
US6689415B2Feb 10, 2004
Method and apparatus for preparing optical information medium
TDK CORP6 citations63
US7952984B2May 31, 2011
Optical recording medium and method of recording and reproducing of optical recording medium
TDK CORP2 citations62
US7524548B2Apr 28, 2009
Optical recording medium
TDK CORP4 citations62
US7458088B2Nov 25, 2008
Intermediate for optical recording medium and method of manufacturing the optical recording medium
TDK CORP5 citations62
US7399511B2Jul 15, 2008
Optical recording medium
TDK CORP3 citations62
US7385911B2Jun 10, 2008
Optical recording medium having multiple layers of different thermal conductivities
TDK CORP2 citations62
US7161893B2Jan 9, 2007
Stamper for fabrication of optical recording medium, method of forming information recording area and light transmissive layer, and optical recording medium
TDK CORP4 citations62
US7138165B2Nov 21, 2006
Intermediate for optical recording medium, mold, molding apparatus, and method of manufacturing optical recording medium
TDK CORP2 citations61
US6815029B2Nov 9, 2004
Stamper, mold system, recording medium substrate, recording medium, optical disc substrate, optical disc, and method for producing stamper
TDK CORP2 citations61
US7517574B2Apr 14, 2009
Optical recording medium and method for manufacturing the same
TDK CORP0 citations52
US7507457B2Mar 24, 2009
Optical recording medium and method of manufacturing the same
TDK CORP1 citations52
US7357970B2Apr 15, 2008
Optical recording medium
TDK CORP0 citations52
US7233565B2Jun 19, 2007
Optical recording medium
TDK CORP1 citations52
US7368156B2May 6, 2008
Method for manufacturing discoid optical record medium and discoid optical record medium
TDK CORP1 citations51
US6835435B2Dec 28, 2004
Stamper, mold system, recording medium substrate, recording medium, optical disc substrate, optical disc, and method for producing stamper
TDK CORP1 citations51
US7932015B2Apr 26, 2011
Optical recording medium
TDK CORP0 citations41
US7680018B2Mar 16, 2010
Optical recording medium, and manufacturing method and manufacturing device thereof
TDK CORP0 citations41
US7447139B2Nov 4, 2008
Light-receiving element, optical head, optical recording/reproducing apparatus, and method of optical recording and reproduction
TDK CORP0 citations41
HITACHI LTD
15 patentsUS6670065B2Dec 30, 2003
Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell
HITACHI LTD47 citations96
US7279244B2Oct 9, 2007
Fuel cell, polyelectrolyte and ion-exchange resin use for same
HITACHI LTD5 citations74
US7022743B2Apr 4, 2006
Fuel cell, polyelectrolyte and ion-exchange resin used for same
HITACHI LTD4 citations74
US6989212B2Jan 24, 2006
Fuel cell, polyelectrolyte and ion-exchange resin used for same
HITACHI LTD5 citations74
US6893764B2May 17, 2005
Solid polyelectrolyte, assembly of membrane and electrodes, and fuel cell
HITACHI LTD11 citations74
US6869713B2Mar 22, 2005
Fuel cell, fuel cell generator, and equipment using the same
HITACHI LTD8 citations71
US7560185B2Jul 14, 2009
Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell
HITACHI LTD2 citations63
US7553574B2Jun 30, 2009
Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell
HITACHI LTD1 citations63
US6964823B2Nov 15, 2005
Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell
HITACHI LTD2 citations63
US7745035B2Jun 29, 2010
Separator and fuel cell using thereof
HITACHI LTD2 citations62
US7745032B2Jun 29, 2010
Fuel cell with humidifier
HITACHI LTD2 citations62
US7678486B2Mar 16, 2010
Separator for fuel cell and fuel cell containing the separator
HITACHI LTD3 citations62
US7320841B2Jan 22, 2008
Fuel cell and separator structure used therein
HITACHI LTD2 citations62
US7541107B2Jun 2, 2009
Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cell
HITACHI LTD0 citations52
US10702944B2Jul 7, 2020
Alloy structure and method for producing alloy structure
HITACHI LTD0 citations42