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HASUMI RITSUO

Overview
  • Total Patents
    159
About

HASUMI RITSUO has a total of 159 patent applications. Its first patent ever was published in 1974. It filed its patents most often in Japan. Its main competitors in its focus markets optics, measurement and environmental technology are SUZUKI TAKEOMI, IBSEN PHOTONICS AS and COOK LACY G.

Patent filings in countries

World map showing HASUMI RITSUOs patent filings in countries
# Country Total Patents
#1 Japan 159

Patent filings per year

Chart showing HASUMI RITSUOs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Hasumi Ritsuo 157
#2 Hasumi Shino 2

Latest patents

Publication Filing date Title
JP2010243995A Awg spectral filter
JP2009282007A Data processing method of portable spectrum analyzer
JP2009212479A Semiconductor laser array with solid optical resonator
JP2009212478A Optical transmitter with optical resonator
JP2009200453A Wavelength stabilizing multiple optical transmitter
JP2009199041A Multiple optical wavelength multiplex transmitter
JP2009200452A Time sharing wavelength stabilizing optical transmitter
JP2009200451A Optical wavelength stabilization optical transmitter
JPS5975204A Manufacture of plastic optical circuit
JPS591334A Manufacture of pack with cover to which cut tape is fitted
JPS58211114A Uneven interval plane diffraction grating
JPS58186021A Integration type spectroscope provided with correcting diffusion lens
JPS58136006A Thin film lens
JPS58123506A Thick film optical integrated circuit of diffusion type
JPS5818614A Optical fiber discriminator
JPS5818609A Manufacture of thick film optical integrated circuit
JPS589114A Connector made of plastic for optical fiber
JPS5792308A Thick film optical branching filter for duplex optical wavelength multiplex transmission
JPS5735254A Tube with through-holes
JPS5737550A Chaff bag