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DAINIHON BUNGU CO LTD

Overview
  • Total Patents
    33
About

DAINIHON BUNGU CO LTD has a total of 33 patent applications. Its first patent ever was published in 1964. It filed its patents most often in United States, Germany and France. Its main competitors in its focus markets consumer goods and basic materials chemistry are BIRO PATENTE AKTIENGESELLSCHAF, STYLOMINE ETS and HENRY GEORGE MARTIN.

Patent filings in countries

World map showing DAINIHON BUNGU CO LTDs patent filings in countries
# Country Total Patents
#1 United States 15
#2 Germany 9
#3 France 5
#4 United Kingdom 2
#5 Brazil 1
#6 Switzerland 1

Patent filings per year

Chart showing DAINIHON BUNGU CO LTDs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Matsumoto Hiroyuki 8
#2 Horie Yukio 6
#3 Hiroyuki Matsumoto 4
#4 Wakai Noboru 1
#5 Tsukahara Yasushi 1
#6 Naruse T 1
#7 Hiroyuku Matsumoto 1
#8 Seta S 1
#9 Yamashita Nagahiro 1
#10 Ikawa M 1

Latest patents

Publication Filing date Title
US3728033A Push-type mechanical pencil with improved lead advancing means
US3713745A Push-type mechanical pencil
US3627434A Mechanical pencil for fine leads
US3575516A Mechanical pencil
US3533708A Ball point pen for water soluble ink
US3510227A Writing instrument
US3477791A Mechanical lead pencil
US3446564A Ballpoint pen for water-soluble ink
US3442596A Mechanical pencil of the push-out type
US3399021A Hard fiber core pen and its cartridge
US3377124A Fiber-tip pen
GB1116223A Improvements in or relating to writing instruments
US3306267A Ink writing implement
US3421823A Writing implement
US3446878A Method of producing pencil lead