Inventor
OHIRA MASAKI
JP27 patents
⚠️ This page may combine multiple inventors who share the name “OHIRA MASAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS6721268B1Apr 13, 2004
Method and apparatus for multiplex transmission
HITACHI LTD77 citations96
US6169754B1Jan 2, 2001
Multiplex transmission apparatuses, multiplex transmission networks, and operation method therefor
HITACHI LTD44 citations96
US6697386B2Feb 24, 2004
Multiplex transmission apparatuses, multiplex transmission networks, and operation method therefor
HITACHI LTD20 citations93
US6094440AJul 25, 2000
Multiplex type transmitting apparatus
HITACHI LTD22 citations93
US7024616B2Apr 4, 2006
Method for encoding/decoding error correcting code, transmitting apparatus and network
HITACHI LTD43 citations92
US6735735B1May 11, 2004
Forward error correcting code encoding equipment, forward error correcting code decoding equipment, and transmission apparatus
HITACHI LTD34 citations92
US5710847AJan 20, 1998
Semiconductor optical functional device
HITACHI LTD23 citations92
US7680414B2Mar 16, 2010
Passive optical network system and operating method thereof
HITACHI LTD13 citations84
US7512867B2Mar 31, 2009
Method for encoding/decoding error correcting code, transmitting apparatus and network
HITACHI LTD10 citations84
US6871314B2Mar 22, 2005
Forward error correcting code encoding equipment, forward error correcting code decoding equipment, and transmission apparatus
HITACHI LTD14 citations84
US7978972B2Jul 12, 2011
Optical line terminal and optical network terminal
HITACHI LTD15 citations79
US6411631B1Jun 25, 2002
Multiplex type transmitting apparatus
HITACHI LTD9 citations74
US7725031B2May 25, 2010
Passive optical network system and ranging system thereof
HITACHI LTD7 citations73
US7711268B2May 4, 2010
Passive optical network system and ranging system thereof
HITACHI LTD5 citations73
US7936992B2May 3, 2011
Apparatus of adjusting optical signal transmission timing
HITACHI LTD2 citations62
US7139479B2Nov 21, 2006
Method and apparatus for optical network administration
HITACHI LTD2 citations62
US7372807B2May 13, 2008
Method and apparatus for multiplex transmission
HITACHI LTD5 citations61
US7386012B2Jun 10, 2008
Multiplex transmission apparatuses, multiplex transmission networks, and operation method therefor
HITACHI LTD0 citations52
HITACHI COMM TECH LTD
3 patentsUS7548694B2Jun 16, 2009
Apparatus of adjusting optical signal transmission timing
HITACHI COMM TECH LTD15 citations92
US7512341B2Mar 31, 2009
Passive optical network system and ranging system thereof
HITACHI COMM TECH LTD4 citations73
US7489869B2Feb 10, 2009
Passive optical network system and ranging system thereof
HITACHI COMM TECH LTD7 citations73
KAZAWA TOHRU
3 patentsUS8811819B2Aug 19, 2014
Optical multiplexing terminal device, wavelength multiplexing passive optical network system and downlink wavelength transmission method
KAZAWA TOHRU16 citations83
US8477800B2Jul 2, 2013
Passive optical network system and operation method thereof
KAZAWA TOHRU5 citations72
US8467684B2Jun 18, 2013
Apparatus of adjusting optical signal transmission timing
KAZAWA TOHRU2 citations62