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KOKUSAI DENSHIN DENWA CO LTD

Overview
  • Total Patents
    3,173
About

KOKUSAI DENSHIN DENWA CO LTD has a total of 3,173 patent applications. Its first patent ever was published in 1955. It filed its patents most often in Japan, United States and United Kingdom. Its main competitors in its focus markets telecommunications, optics and audio-visual technology are HERTZ INST HEINRICH, KDD CORP and LASERNET INC.

Patent filings per year

Chart showing KOKUSAI DENSHIN DENWA CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Akiba Shigeyuki 306
#2 Yamamoto Shu 204
#3 Wakabayashi Hiroharu 164
#4 Sakai Kazuo 145
#5 Matsushima Yuichi 138
#6 Suzuki Masatoshi 122
#7 Taga Hidenori 105
#8 Kobayashi Hideo 98
#9 Ejiri Yoshihiro 97
#10 Iwamoto Yoshinao 95

Latest patents

Publication Filing date Title
US6285477B1 Multi-wavelength light source and discrete-wavelength-variable light source
US6037612A Semiconductor light emitting device having nanostructure porous silicon and mesostructure porous silicon
JPH10257497A Motion compensation predicting method for interlaced moving image signal and encoder
JPH10257496A Motion compensation prediction device for interlaced motion image
US6147974A Apparatus for monitoring state of traffic in telecommunication network
JPH10308824A Discrimination device for understanding state in communication network
EP0859330A1 Document retrieval apparatus
JPH10318748A Method and system for measuring position
US5881154A Data scramble transmission system
JPH1185182A Speaker recognition method and its apparatus
JPH1188560A Exchange service system and information service system
JPH1185200A Acoustic analysis method for speech recognition
JPH1185016A Method for designing authentication system and digital signature system
JPH1187824A Light amplifier
JPH1187823A Light amplifier
JPH1187811A Laser device
JPH1187815A Multi-wavelength light source
US5764860A Learning method for multi-level neural network
US5933821A Method and apparatus for detecting causality
JPH1168704A Optical power measurement system and terminal station and repeater for the system