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DDI CORP

Overview
  • Total Patents
    91
About

DDI CORP has a total of 91 patent applications. Its first patent ever was published in 1995. It filed its patents most often in Japan, United States and EPO (European Patent Office). Its main competitors in its focus markets telecommunications, digital networks and audio-visual technology are ZHEJIANG YUANWANG COMMUNICATION TECH CO LTD, FIHEM and RUGGEDCOM INC.

Patent filings per year

Chart showing DDI CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Suzuki Masatoshi 8
#2 Edagawa Noboru 6
#3 Usami Masashi 6
#4 Matsumoto Shigeki 5
#5 Hara Shoji 5
#6 Ishida Akira 5
#7 Kato Yasuhito 5
#8 Sakata Haruhisa 5
#9 Otani Tomohiro 4
#10 Yamamoto Shu 4

Latest patents

Publication Filing date Title
JP2003298238A Inverted micro via
US2001029480A1 Competitive buying and selling system and its control method
US7212972B2 Audio features description method and audio video features description collection construction method
JP2001160067A Method for retrieving similar document and recommended article communication service system using the method
JP2001111973A Moving image electronic watermark device
JP2001154070A Optical fiber cable
JP2001154952A Device for continuously gathering and keeping data and recording medium recording program therefor
JP2001156713A Ring network optical switching system
JP2001147409A Optical signal processor
JP2001141408A Position measuring method, position indicating method and position measuring apparatus
JP2001136548A Monitor device for objective evaluation of image
JP2001136284A Message call communication system
JP2001133651A Mode conversion optical fiber
JP2001127706A Wdm optical transmission system and optical transmission device
JP2001124507A Position-measuring method
JP2001124555A Position-measuring method
JP2001125153A Optical gate device
JP2001116944A Method for adding optical coupler to plane optical circuit and plane optical circuit
JP2001117127A Optical wavelength conversion device
JP2001112051A Mobile communication system with communication traffic prediction device