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OPT TECHNO KK

Overview
  • Total Patents
    23
About

OPT TECHNO KK has a total of 23 patent applications. Its first patent ever was published in 1995. It filed its patents most often in Japan. Its main competitors in its focus markets audio-visual technology and environmental technology are DANREX KK, WUXI DALISHEN STEEL STRUCTURE SCIENCE & TECHNOLOGY CO LTD and SUMIYOSHI KINZOKU KK.

Patent filings in countries

World map showing OPT TECHNO KKs patent filings in countries
# Country Total Patents
#1 Japan 23

Patent filings per year

Chart showing OPT TECHNO KKs patent filings per year from 1900 to 2020

Focus technologies

Top inventors

# Name Total Patents
#1 Hasegawa Teiji 15
#2 Tanaka Hirokazu 11
#3 Sasuga Shigeo 8
#4 Kimura Masatake 6
#5 Chiba Yasutsune 2
#6 Osawa Takeshi 2
#7 Yoshihara Hiroaki 2
#8 Ujiie Toshihiko 2
#9 Maeyashiki Yoshiki 2
#10 Morito Katsumi 2

Latest patents

Publication Filing date Title
JP2003194327A Combustion equipment with level detector
JP2002327917A Liquid tank for burning appliance
JP2002050788A Light-emitting/receiving device
JP2001317984A Liquid level detector
JP2001208596A Liquid level-detecting device
JP2001099683A Encoder
JP2000046630A Liquid level detecting element
JP2000340828A Photocoupler and manufacture thereof
JPH10308525A Solar cell device
JPH112554A Liquid level detecting element
JPH10185655A Liquid level sensor, and liquid supplying device and liquid fuel combustion device using the level sensor
JPH10185656A Liquid level sensor
JPH10153472A Liquid level detecting element
JPH10148563A Liquid level detecting element and liquid level detecting apparatus
JPH10142027A Liquid level sensing element and liquid level sensor
JPH1096662A Element and apparatus for detecting liquid level
JPH1048025A Liquid detector
JPH1051015A Photoelectric conversion element and its manufacture
JPH09318419A Liquid detector and controller using the detector
JPH09257547A Liquid detecting element