Inventor · disambiguated record
Takafumi Chiba
Also filed as: CHIBA TAKAFUMI
8 granted patents·64 citations·filing 2000–2018
84Inventor score
Top patents by PatentIndex Score
8 records- 0179US6947631B2Waveguide-type optical multiplexer/demultiplexerHITACHI CABLE·Filed 2002·Granted Sep 20, 2005·19 cites·6 claims
- 0273US6556749B2Array waveguide grating and method of manufacture thereofHITACHI CABLE·Filed 2000·Granted Apr 29, 2003·17 cites·34 claims
- 0369US6724954B2Optical multiplexer/demultiplexerHITACHI CABLE INC·Filed 2001·Granted Apr 20, 2004·14 cites·6 claims
- 0458US6631223B2Optical multiplexer/demultiplexerHITACHI CABLE·Filed 2001·Granted Oct 7, 2003·6 cites·14 claims
- 0554US6643427B2Waveguide-arrayed optical wavelength multiplexer/demultiplexer and fabrication method of the sameHITACHI CABLE·Filed 2001·Granted Nov 4, 2003·5 cites·4 claims
- 0646US6980707B2Waveguide type variable optical attenuatorHITACHI CABLE·Filed 2003·Granted Dec 27, 2005·3 cites·12 claims
- 0737US11125925B2Optical elementAUTOCLONING TECH LTD·Filed 2017·Granted Sep 21, 2021·0 cites·7 claims
- 0835US11372145B2Optical element and optical circuitAUTOCLONING TECH LTD·Filed 2018·Granted Jun 28, 2022·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →