Inventor · disambiguated record
Koichi Maru
Also filed as: MARU KOICHI
4 granted patents·174 citations·filing 1998–2000
79Inventor score
Technology areasG02B
Top patents by PatentIndex Score
4 records- 0190US6069990AOptical wavelength multiplexer/demultiplexerHITACHI CABLE·Filed 1998·Granted May 30, 2000·115 cites·5 claims
- 0285US6549696B1Optical wavelength multiplexer/demultiplexerHITACHI CABLE·Filed 2000·Granted Apr 15, 2003·40 cites·24 claims
- 0373US6556749B2Array waveguide grating and method of manufacture thereofHITACHI CABLE·Filed 2000·Granted Apr 29, 2003·17 cites·34 claims
- 0430US6317534B1Optical wavelength routing deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Nov 13, 2001·2 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →