Learn more

YAMAMOTO KOGAKU

Overview
  • Total Patents
    393
  • GoodIP Patent Rank
    33,701
  • Filing trend
    ⇩ 25.0%
About

YAMAMOTO KOGAKU has a total of 393 patent applications. It decreased the IP activity by 25.0%. Its first patent ever was published in 1981. It filed its patents most often in Japan, Republic of Korea and United States. Its main competitors in its focus markets optics, medical technology and furniture and games are WINTER OPTIK, KOREA OGK CO LTD and POLYLITE TAIWAN CO LTD.

Patent filings per year

Chart showing YAMAMOTO KOGAKUs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Yamamoto Tamenobu 75
#2 Oka Koichiro 56
#3 Matsumoto Kimio 46
#4 Kobuchi Nobuyuki 30
#5 Aoyama Naoya 26
#6 Ishibashi Fumio 22
#7 Tominaga Hirofumi 21
#8 Yasuhara Kazuto 21
#9 Ishiba Yoshihisa 21
#10 Tominaga Hiroshi 19

Latest patents

Publication Filing date Title
US2021072558A1 Eyeglasses
KR20210029664A Face fitting and buckle for face fitting
JP2020184688A Face fitting
JP2020063938A Mask adhesion degree determination device
JP2019088388A Goggle
JP2019085669A Face shield and protector
JP2019041957A Mask adhesion determination device
JP2019044647A Fan unit and breathing protector equipped with the fan unit
JP2018189678A Wearable device holding gear, and face or head-mounted gear including holding gear
JP2018171275A Eye protective device
JP2018089158A Respiratory protection device
JP2018075265A Belt length adjuster
JP2018054994A Protective glasses
JP2016148876A Spectacles
JP2017086410A Band length adjustment body of face fittings
JP2016053724A Circularly polarizing plate, circularly polarizing lens, and circularly polarizing spectacles
JP2016012153A Spectacles
JP2016224232A Spectacle frame and attachment
JP2016131832A Eye protector
KR20150091218A Goggles