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KUMAGAI NAOKI

Overview
  • Total Patents
    22
About

KUMAGAI NAOKI has a total of 22 patent applications. Its first patent ever was published in 1987. It filed its patents most often in Japan. Its main competitors in its focus markets environmental technology and civil engineering are TIANJIN PORT & CHANNEL ENGINEERING CO LTD, SEABED SCOUR CONTROL SYST and TAIYO GIJUTSU KAIHATSU KK.

Patent filings in countries

World map showing KUMAGAI NAOKIs patent filings in countries
# Country Total Patents
#1 Japan 22

Patent filings per year

Chart showing KUMAGAI NAOKIs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Kumagai Naoki 20
#2 Kumagai Shigeto 2

Latest patents

Publication Filing date Title
JP2008042867A Digital camera, digital video camera with function to simulate way to get image of color deficient observer
JP2006141877A Spoon
JP2003268793A Catchment and drainage member for stratum
JP2001152465A Honeycomb retaining wall structural body and honeycomb retaining wall
JPH11151037A Structure for supplying air into soil and method for its construction
JPH1075849A Sand guard bench and retaining wall
JPH09125344A Check-valve
JPH08333761A Retaining wall drainage draining structure
JPH0860642A Water collection and drain pipe and pipe joint thereof
JPH0860644A Drainage pipe
JPH0860643A Narrow width collecting and drain pipe and pipe joint thereof
JPH0842198A Structure of protective cover for support concrete of ground fence concrete
JPH07300871A Variable size lightweight cover
JPH0747795A Multifunctional scale
JPH06126016A Concrete fence mounting structure
JPH0483005A Natural cooling and draining device for artificial lawn
JPH03287934A Joint box for drainage pipe
JPH03279509A Filter material
JPH03247204A Natural lawn bed, base box of breeding natural lawn and production of natural lawn
JPH03217512A Water collecting and drain pipe and device constructed therewith