Masaki Ohira

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical multiplexing terminal device, wavelength multiplexing passi...
- Patent number 8,811,819
- Issue date Aug 19, 2014
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Encryption apparatus
- Patent number 8,675,870
- Issue date Mar 18, 2014
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and operation method thereof
- Patent number 8,477,800
- Issue date Jul 2, 2013
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus of adjusting optical signal transmission timing
- Patent number 8,467,684
- Issue date Jun 18, 2013
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical access system
- Patent number 8,457,492
- Issue date Jun 4, 2013
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical line terminal and optical network terminal
- Patent number 8,078,929
- Issue date Dec 13, 2011
- Hitachi, Ltd.
- Masaki Ohira
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Optical line terminal and optical network terminal
- Patent number 7,978,972
- Issue date Jul 12, 2011
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus of adjusting optical signal transmission timing
- Patent number 7,936,992
- Issue date May 3, 2011
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and ranging system thereof
- Patent number 7,725,031
- Issue date May 25, 2010
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and ranging system thereof
- Patent number 7,711,268
- Issue date May 4, 2010
- Hitachi, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and operating method thereof
- Patent number 7,680,414
- Issue date Mar 16, 2010
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus of adjusting optical signal transmission timing
- Patent number 7,548,694
- Issue date Jun 16, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for encoding/decoding error correcting code, transmitting ap...
- Patent number 7,512,867
- Issue date Mar 31, 2009
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and ranging system thereof
- Patent number 7,512,341
- Issue date Mar 31, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Passive optical network system and ranging system thereof
- Patent number 7,489,869
- Issue date Feb 10, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiplex transmission apparatuses, multiplex transmission networks...
- Patent number 7,386,012
- Issue date Jun 10, 2008
- Hitachi, Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for multiplex transmission
- Patent number 7,372,807
- Issue date May 13, 2008
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for optical network administration
- Patent number 7,139,479
- Issue date Nov 21, 2006
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for encoding/decoding error correcting code, transmitting ap...
- Patent number 7,024,616
- Issue date Apr 4, 2006
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Forward error correcting code encoding equipment, forward error cor...
- Patent number 6,871,314
- Issue date Mar 22, 2005
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Forward error correcting code encoding equipment, forward error cor...
- Patent number 6,735,735
- Issue date May 11, 2004
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for multiplex transmission
- Patent number 6,721,268
- Issue date Apr 13, 2004
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiplex transmission apparatuses, multiplex transmission networks...
- Patent number 6,697,386
- Issue date Feb 24, 2004
- Hitachi , Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiplex type transmitting apparatus
- Patent number 6,411,631
- Issue date Jun 25, 2002
- Hitachi, Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiplex transmission apparatuses, multiplex transmission networks...
- Patent number 6,169,754
- Issue date Jan 2, 2001
- Hitachi, Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multiplex type transmitting apparatus
- Patent number 6,094,440
- Issue date Jul 25, 2000
- Hitachi, Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor optical functional device
- Patent number 5,710,847
- Issue date Jan 20, 1998
- Hitachi, Ltd.
- Hideaki Takano
- G02 - OPTICS
Information Patent Grant
Bipolar transistor
- Patent number 4,860,082
- Issue date Aug 22, 1989
- NEC Corporation
- Masatoshi Moriyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of making a bipolar transistor
- Patent number 4,695,328
- Issue date Sep 22, 1987
- NEC Corporation
- Masatoshi Moriyama
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL MULTIPLEXING TERMINATING DEVICE, WAVE-LENGTH MULTIPLEXING P...
- Publication number 20120093509
- Publication date Apr 19, 2012
- Hitachi, Ltd.
- Tohru KAZAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING
- Publication number 20110170871
- Publication date Jul 14, 2011
- Hitachi, Ltd
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL ACCESS SYSTEM
- Publication number 20100296811
- Publication date Nov 25, 2010
- Hitachi, Ltd
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND OPERATION METHOD THEREOF
- Publication number 20100290783
- Publication date Nov 18, 2010
- Hitachi, Ltd
- Tohru KAZAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING
- Publication number 20090214211
- Publication date Aug 27, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru KAZAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF
- Publication number 20090052896
- Publication date Feb 26, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF
- Publication number 20090052897
- Publication date Feb 26, 2009
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF
- Publication number 20080317469
- Publication date Dec 25, 2008
- Hitachi Communication Technologies, Ltd.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Passive optical network system and operating method thereof
- Publication number 20080187312
- Publication date Aug 7, 2008
- HITACHI COMMUNICATION TEHCNOLOGIES, LTD.
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical line terminal and optical network terminal
- Publication number 20080163021
- Publication date Jul 3, 2008
- Masaki Ohira
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Encryption apparatus
- Publication number 20080155255
- Publication date Jun 26, 2008
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical line terminal and optical network terminal
- Publication number 20080145064
- Publication date Jun 19, 2008
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Passive optical network system and ranging system thereof
- Publication number 20080089686
- Publication date Apr 17, 2008
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Apparatus of adjusting optical signal transmission timing
- Publication number 20080089685
- Publication date Apr 17, 2008
- Tohru Kazawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method for encoding/decoding error correcting code, transmitting ap...
- Publication number 20060212780
- Publication date Sep 21, 2006
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for multiplex transmission
- Publication number 20040184403
- Publication date Sep 23, 2004
- Hitachi, Ltd.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multiplex transmission apparatuses, multiplex transmission networks...
- Publication number 20040165618
- Publication date Aug 26, 2004
- Hitachi, Ltd.
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Forward error correcting code encoding equipment, forward error cor...
- Publication number 20030115529
- Publication date Jun 19, 2003
- Hitachi, Ltd
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for optical network administration
- Publication number 20020131101
- Publication date Sep 19, 2002
- HITACHI, LTD.
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Error correction transmission apparatus
- Publication number 20020091982
- Publication date Jul 11, 2002
- Hitachi, Ltd
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method for encoding/decoding error correcting code, transmitting ap...
- Publication number 20010053225
- Publication date Dec 20, 2001
- Masaki Ohira
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Multiplex transmission apparatuses, multiplex transmission networks...
- Publication number 20010001002
- Publication date May 10, 2001
- Toshiki Sugawara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Masaki Ohira

Person

Patents Grantslast 30 patents

Optical multiplexing terminal device, wavelength multiplexing passi...

Encryption apparatus

Passive optical network system and operation method thereof

Apparatus of adjusting optical signal transmission timing

Optical access system

Optical line terminal and optical network terminal

Optical line terminal and optical network terminal

Apparatus of adjusting optical signal transmission timing

Passive optical network system and ranging system thereof

Passive optical network system and ranging system thereof

Passive optical network system and operating method thereof

Apparatus of adjusting optical signal transmission timing

Method for encoding/decoding error correcting code, transmitting ap...

Passive optical network system and ranging system thereof

Passive optical network system and ranging system thereof

Multiplex transmission apparatuses, multiplex transmission networks...

Method and apparatus for multiplex transmission

Method and apparatus for optical network administration

Method for encoding/decoding error correcting code, transmitting ap...

Forward error correcting code encoding equipment, forward error cor...

Forward error correcting code encoding equipment, forward error cor...

Method and apparatus for multiplex transmission

Multiplex transmission apparatuses, multiplex transmission networks...

Multiplex type transmitting apparatus

Multiplex transmission apparatuses, multiplex transmission networks...

Multiplex type transmitting apparatus

Semiconductor optical functional device

Bipolar transistor

Method of making a bipolar transistor

Patents Applicationslast 30 patents

OPTICAL MULTIPLEXING TERMINATING DEVICE, WAVE-LENGTH MULTIPLEXING P...

APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING

OPTICAL ACCESS SYSTEM

PASSIVE OPTICAL NETWORK SYSTEM AND OPERATION METHOD THEREOF

APPARATUS OF ADJUSTING OPTICAL SIGNAL TRANSMISSION TIMING

PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF

PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF

PASSIVE OPTICAL NETWORK SYSTEM AND RANGING SYSTEM THEREOF

Passive optical network system and operating method thereof

Optical line terminal and optical network terminal

Encryption apparatus

Optical line terminal and optical network terminal

Passive optical network system and ranging system thereof

Apparatus of adjusting optical signal transmission timing

Method for encoding/decoding error correcting code, transmitting ap...

Method and apparatus for multiplex transmission

Multiplex transmission apparatuses, multiplex transmission networks...

Forward error correcting code encoding equipment, forward error cor...

Method and apparatus for optical network administration

Error correction transmission apparatus

Method for encoding/decoding error correcting code, transmitting ap...

Multiplex transmission apparatuses, multiplex transmission networks...