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TOA STEEL CO LTD

Overview
  • Total Patents
    145
About

TOA STEEL CO LTD has a total of 145 patent applications. Its first patent ever was published in 1986. It filed its patents most often in Japan, United States and Brazil. Its main competitors in its focus markets materials and metallurgy, environmental technology and machine tools are ZHUZHOU XIANGNING HIGH AND MEDIUM FREQUENCY EQUIPMENT CO LTD, KOSHUHA NETSUREN KK and INST METALLURG I MATERIALOVEDE.

Patent filings in countries

World map showing TOA STEEL CO LTDs patent filings in countries

Patent filings per year

Chart showing TOA STEEL CO LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Eguchi Toyoaki 67
#2 Suga Fumihiko 29
#3 Ito Katsumi 14
#4 Majima Hiroshi 12
#5 Ohwada Noriyoshi 11
#6 Osuzu Hirotada 10
#7 Oowada Noriyoshi 9
#8 Tate Masahisa 8
#9 Doi Akira 8
#10 Okuma Takeshi 7

Latest patents

Publication Filing date Title
JP2000063948A Manufacture of super machining steel bar stock and wire rod and part and supermachining steel bar stock and wire rod and part thereby
JP2000017390A High strength cold forming non-heat treated steel material for shock-absorbing/restoring mechanism member
JPH11350067A Free cutting hot working steel, coarse shape material, free cutting hot working product using them and production thereof
JPH11335718A Method for utilizing magnesia base waste brick
JPH11324414A Lattice panel for fence
JPH11199924A Manufacture of non-heat treated steel part with high strength and low ductility
JPH11199926A Production of bar steel for high strength bolt, excellent in cold workability and delayed fracture resistance
JPH1182463A Fastening method of member by bolt and nut
JPH1150147A Production of high strength reinforcing bag
JPH1143721A High strength spring steel and its manufacture
JPH1136016A Quenching method for case hardening steel capable of preventing heat treatment strain
JPH1136060A Quenching method for preventing heat treating strain in case hardening steel
JPH115575A Bicycle parking device
JPH10330836A Production of hot forged parts excellent in machinability and fatigue characteristic
JPH10329770A Bicycle parking device
JPH10329769A Bicycle parking device
JPH10299276A Roof structure
JPH10299213A Handrail joint
JPH1017943A Method for directly quenching hot-rolled steel wire rod
JPH10220444A Double action rod screw