Inventor · disambiguated record
Etsuo Koyama
Also filed as: KOYAMA ETSUO
3 granted patents·7 pending applications·11 citations·filing 1982–2009
62Inventor score
Top patents by PatentIndex Score
10 records- 0177US7343064B2Optical switch and optical add/drop multiplexerTECDIA CO LTD·Filed 2006·Granted Mar 11, 2008·7 cites·5 claims
- 0254US7387452B2Semiconductor laser moduleTECDIA CO LTD·Filed 2007·Granted Jun 17, 2008·2 cites·4 claims
- 0342US2009123152A1Optical switching device and optical receiverKOYAMA ETSUO·Filed 2008·Application pending·0 cites
- 0440US2009154921A1Control system and method for optical communication device applicationTECDIA CO LTD·Filed 2008·Application pending·0 cites
- 0540US2009141748A1Tunable laser light source and controlling method of the sameTECDIA CO LTD·Filed 2008·Application pending·0 cites
- 0640US2009196609A1Optical communication apparatus and optical lan systemKOYAMA ETSUO·Filed 2009·Application pending·0 cites
- 0739US2009154506A1Tunable laser moduleTECDIA CO LTD·Filed 2008·Application pending·0 cites
- 0839US2009140278A1Tunable LED moduleTECDIA CO LTD·Filed 2008·Application pending·0 cites
- 0937US2007177637A1Tunable optical filter and external-resonator-type semiconductor laser device using the sameTECDIA CO LTD·Filed 2006·Application pending·0 cites
- 1021US4558443AMoving coil type pickup cartridgeTEKUDAIYA KABUSHIKI KAISHA·Filed 1982·Granted Dec 10, 1985·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →