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KOYAMA YUJI

Overview
  • Total Patents
    16
About

KOYAMA YUJI has a total of 16 patent applications. Its first patent ever was published in 1984. It filed its patents most often in Japan, United States and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets optics, semiconductors and basic materials chemistry are O FLEX CO LTD, INNOX ADVANCED MAT CO LTD and YANTAI DEBANG ADVANCED SILICON MATERIALS CO LTD.

Patent filings in countries

World map showing KOYAMA YUJIs patent filings in countries

Patent filings per year

Chart showing KOYAMA YUJIs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Koyama Yuji 16
#2 An Mingxing 2

Latest patents

Publication Filing date Title
WO2012029186A1 Electric lock and electronic lock system using same
WO2010143517A1 Electronic lock system that supports media on which non-contact ic chips are mounted and method of attesting third parties and of releasing locks
JP2007009690A Wooden floor structure of apartment block
JP2004332340A Wooden floor structure of apartment and its construction method
JP2003213808A Highly functional handrail and ventilator
JP2001170133A Moxibustion plate, method for manufacturing of the same and holding tool of moxibustion plate
JP2001020627A Manufacture of wooden door and wooden door manufacturing kit
JPH1046928A Wooden door element piece and wooden door using it
JPH08164091A Device for lifting up toilet seat in toilet bowl
JPH082385A Wiper device for vehicle
JPS6194656A Moxibustion table