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21 KK

Overview
  • Total Patents
    14
  • GoodIP Patent Rank
    230,350
About

21 KK has a total of 14 patent applications. Its first patent ever was published in 2002. It filed its patents most often in Japan. Its main competitors in its focus markets optics are XIAMEN YARUI OPTICAL CO LTD, VIVA IP CORP and MARUMAN OPTICAL KK.

Patent filings in countries

World map showing 21 KKs patent filings in countries
# Country Total Patents
#1 Japan 14

Patent filings per year

Chart showing 21 KKs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics

Focus technologies

# Technology
#1 Spectacles

Top inventors

# Name Total Patents
#1 Hiramoto Kiyoshi 13
#2 Hiramoto Junko 1
#3 Horikawa Kaoru 1
#4 Sanae Setsuro 1

Latest patents

Publication Filing date Title
JP2015038608A Spectacle without nose pad
JP2014059544A Spectacles with hearing aids
JP2014006404A Spectacle
JP2013195853A Duplex flip-up spectacles
JP2013097213A Stereoscopic vision loupe
JP2010060624A Temple having adjustable length and spectacles including the same
JP2009031745A Rimless glasses
JP2008122432A Single focus lens rimless eyeglasses
JP2008076874A Unfixed type spectacles with protection member
JP2006030807A Spectacle frame and lens hanger
JP2005084133A Bracket-fixing structure of rimless spectacles and bracket-fixing method
JP2004053689A Connection structure of eyeglasses
JP2004053691A Eyeglasses with screw-less hinge
JP2004053690A Screw-less hinge and spectacles with same