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HIRAKAWA TEKKOSHO

Overview
  • Total Patents
    90
About

HIRAKAWA TEKKOSHO has a total of 90 patent applications. Its first patent ever was published in 1974. It filed its patents most often in Japan, Brazil and United States. Its main competitors in its focus markets thermal processes, environmental technology and machines are AUTOFLAME ENG LTD, JYDSK VARMEKEDELFAB AS and BABCOCK POWER LTD.

Patent filings in countries

World map showing HIRAKAWA TEKKOSHOs patent filings in countries
# Country Total Patents
#1 Japan 83
#2 Brazil 4
#3 United States 2
#4 Germany 1

Patent filings per year

Chart showing HIRAKAWA TEKKOSHOs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kobayashi Hiroshi 48
#2 Ueda Yoshiharu 30
#3 Hayashi Yoshio 26
#4 Mizobuchi Izumi 25
#5 Imatani Hiroaki 18
#6 Ishitani Kiyomiki 14
#7 Uenashi Atsumi 12
#8 Yamamoto Masamichi 12
#9 Kawai Mitsushi 11
#10 Yoshida Seiji 8

Latest patents

Publication Filing date Title
JPH0468202A Method of removing dissolved oxygen in supplied water for boiler
JPH0468201A Split type round boiler with free deformable semi-restricting coupler
JPH0448101A Combination type boiler
JPH0420701A Method of controlling boiler load and its device
JPH03281068A Automatic welding equipment
JPH03260501A Modular type boiler
DE3943223A1 WATER TUBE BOILER
JPH03158601A Control of boiler load and its device
JPH0332714A Vapor-liquid separation device combining baffle plat with spouting pipe
JPH031001A Generator
JPH02302501A Method and device for pressure maintenance and heat insulation of boiler under stoppage of combustion
JPH02230001A Device to generate steam in exhaust heat boiler and its operation
JPH02187501A Device to start steam of exhaust heat boiler and operation of the same device to start steam generation
JPH0278894A Heat exchanger and the like consisting of smoke tube having square heat transfer surface
JPH0278802A Boiler and operation method for boiler
JPH0278898A Boiler equipped with a cleaning device and cleaning of the same boiler
JPH0275803A Flue water tube boiler
JPH0275804A Vertical boiler
JPH01273901A Boiler
JPH01159502A Waste heat recovery boiler