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SHIRAI KENJI

Overview
  • Total Patents
    13
  • GoodIP Patent Rank
    227,887
  • Filing trend
    ⇩ 100.0%
About

SHIRAI KENJI has a total of 13 patent applications. It decreased the IP activity by 100.0%. Its first patent ever was published in 1975. It filed its patents most often in Japan and United States. Its main competitors in its focus markets optics, machines and basic materials chemistry are OXFORD FIBER LTD, NYFORS TEKNOLOGI AB and ASAHI KOODEN KK.

Patent filings in countries

World map showing SHIRAI KENJIs patent filings in countries
# Country Total Patents
#1 Japan 9
#2 United States 4

Patent filings per year

Chart showing SHIRAI KENJIs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Shirai Kenji 13
#2 Kashima Keiji 4
#3 Kuroda Takashi 3
#4 Haritani Takeshi 2

Latest patents

Publication Filing date Title
JP2018188115A Bicycle alarm device
JP2008044542A Braking device of bicycle
US2007042189A1 Retardation film and method for producing the same, optical functional film, polarizing film, and display device
JP2006290208A Drive device for bicycle
US2006073340A1 Retardation film and mehtod for manufacturing the same, optical function film, polarizer film, and display device
JP2006123565A Folding bicycle
US2006073326A1 Retardation film and method for manufacturing the same
JP2005280488A Bicycle pedal effort detecting device
JP2002308174A Shaft frame for two-wheeler and two-wheeler
JP2001310786A Shaft frame for two-wheeled vehicle, and two-wheeled vehicle
JPH0648252A Umbrella-stand fitting structure of seat
JPS51132305A Low harmful engine