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HAMAI IND LTD

Overview
  • Total Patents
    30
  • GoodIP Patent Rank
    235,365
  • Filing trend
    ⇩ 100.0%
About

HAMAI IND LTD has a total of 30 patent applications. It decreased the IP activity by 100.0%. Its first patent ever was published in 1999. It filed its patents most often in Japan, United States and Republic of Korea. Its main competitors in its focus markets mechanical elements, environmental technology and machines are LIONGAS AG, LUXEMBOURG PATENT CO and LUXEMBOURG PATENT CO SA.

Patent filings in countries

World map showing HAMAI IND LTDs patent filings in countries
# Country Total Patents
#1 Japan 23
#2 United States 5
#3 Republic of Korea 2

Patent filings per year

Chart showing HAMAI IND LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Kawamura Nobuyuki 6
#2 Ohashi Koichi 4
#3 Hamai Kenichiro 4
#4 Koizumi Masao 4
#5 Chiba Hiroshi 4
#6 Kikuchi Toshiaki 3
#7 Hasaka Satoshi 2
#8 Shibata Katsuya 2
#9 Kuwabara Hirokazu 2
#10 Horiuchi Yutaka 2

Latest patents

Publication Filing date Title
JP2019007513A Opening/closing operation valve
JP2014074464A Operating handle
JP2008303902A Opening indication device of open/close valve
JP2008138746A Check valve
JP2007187235A Operation handle with display mechanism
JP2007146875A Pressure regulator
US2006157122A1 Pressure-reducing valve for high-pressure gas cylinders
JP2006046439A On-off valve and pilot valve
JP2006031453A Pressure regulating valve
JP2005265032A Seat structure
JP2005211773A Filter
JP2005214278A Mounting valve for portable type liquefied gas vessel
JP2005207480A Vessel valve
JP2004360893A Pressure reducing valve for high-pressure gas tank
JP2005004553A Pressure reducing valve
JP2004255460A Welding method of stainless steel with nickel-cobalt alloy and valve body attached with diaphragm
JP2004257549A Diaphragm fixing structure
JP2003342666A Lead-free and cadmium-free low melting point alloy, temperature sensitive safety valve and fuse element
JP2004162822A Multi-directional selector valve
US7225810B2 Valve for use in high pressure gas containers