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HITACHI COMM TECH LTD

Overview
  • Total Patents
    1,312
About

HITACHI COMM TECH LTD has a total of 1,312 patent applications. Its first patent ever was published in 1996. It filed its patents most often in Japan, United States and China. Its main competitors in its focus markets telecommunications, digital networks and environmental technology are UT STARCOM INC, NORTEL NETWORKS LTD and MITSUBISHI ELECTRIC TELECOM EU.

Patent filings per year

Chart showing HITACHI COMM TECH LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Mizutani Masahiko 50
#2 Miyata Hiroaki 47
#3 Kazawa Toru 43
#4 Ashi Masahiro 42
#5 Mazawa Shiro 42
#6 Takahashi Yosuke 34
#7 Sakamoto Kenichi 34
#8 Takase Masayoshi 30
#9 Saito Toshiyuki 30
#10 Yano Takashi 29

Latest patents

Publication Filing date Title
JP2010004580A Wireless communication network and software updating method
JP2009268128A Data communication device, and data communication method
JP2009239952A Ipv6 address allocation method
JP2009182997A Passive optical network system and wavelength assignment method
JP2009189055A Radio base station
JP2009189054A Radio base station
JP2009182986A Transmission power control method
JP2009165189A Decoding key distribution method and authentication device
JP2009165166A Optical transmission apparatus
JP2010028795A Balanced compensation type optical balanced receiver and optical iq receiver
JP2009135995A Station-side optical communication apparatus and optical communication system
JP2009153194A Radio base station device
JP2009124759A Packet transfer device, and packet transfer method
JP2009189026A Passive optical network system and station-side optical line terminal device
JP2009165154A Terminal and communication method thereof
JP2009182971A Network system
JP2009165152A Packet transfer device
JP2009201115A Optical access system with encryption apparatus, and encryption method thereof
JP2009112060A Area management system
JP2009112059A Communication apparatus