Learn more

KEIWA INC

Overview
  • Total Patents
    720
  • GoodIP Patent Rank
    6,243
  • Filing trend
    ⇧ 103.0%
About

KEIWA INC has a total of 720 patent applications. It increased the IP activity by 103.0%. Its first patent ever was published in 1998. It filed its patents most often in Japan, Taiwan and Republic of Korea. Its main competitors in its focus markets optics, surface technology and coating and electrical machinery and energy are WEBER MICHAEL F, DONGGUAN LIGHT CHI PHOTOELECTRIC CO LTD and POSSMEDIA CO LTD.

Patent filings per year

Chart showing KEIWA INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Harada Kenichi 108
#2 Okabe Motohiko 103
#3 Tsuji Takahiro 89
#4 Furuta Akira 59
#5 Nakashima Hironori 43
#6 Akamatsu Tadashi 41
#7 Nonaka Tadayuki 39
#8 Namikawa Yoshitada 38
#9 Mineo Yutaka 36
#10 Kamikita Masakazu 33

Latest patents

Publication Filing date Title
WO2021014813A1 Light-diffusing sheet
JP2020089390A Agricultural cutoff sheet
JP2020181807A Protective film for oled display with fingerprint authentication device
EP3736624A1 Multilayer of light diffusers, backlight unit, and liquid crystal display device
JP2020060759A Optical sheet, backlight unit, liquid crystal display, and information appliance
JP2021004911A Diffusion sheet, backlight unit, liquid crystal display device, and information equipment
JP2020079920A Optical diffusion plate-laminated body, backlight unit, and liquid crystal display device
JP2020111676A Polycarbonate resin film
JP2020106381A Jig for measuring linear expansion coefficient, device for measuring linear expansion coefficient, and method for measuring linear expansion
JP2020104386A Shape transfer sheet, and method for producing shape transfer sheet
JP2020104346A Method for producing polycarbonate resin film
JP2020095096A Light diffusion plate and backlight unit
JP2020064787A Backlight unit and liquid crystal display device
JP2020021039A Light diffusion plate and backlight unit
KR20190017662A A buffer sheet and a flat panel display
JP2019035951A Buffer sheet and flat panel display
JP2019215417A Anti-glare film
JP2019214136A Process paper for forming polyurethane coat layer
WO2018225463A1 Upper-side light diffuser sheet and backlight unit equipped with same
JP2019184772A Anti-glare film