Inventor · disambiguated record
Tatsuo Izawa
Also filed as: IZAWA TATSUO
7 granted patents·1 pending application·341 citations·filing 1975–2004
88Inventor score
Top patents by PatentIndex Score
8 records- 0197US4062665AContinuous optical fiber preform fabrication methodNIPPON TELEGRAPH & TELEPHONE·Filed 1977·Granted Dec 13, 1977·102 cites·14 claims
- 0294US3957474AMethod for manufacturing an optical fibreNIPPON TELEGRAPH & TELEPHONE·Filed 1975·Granted May 18, 1976·70 cites·14 claims
- 0389US4425146AMethod of making glass waveguide for optical circuitNIPPON TELEGRAPH & TELEPHONE·Filed 1980·Granted Jan 10, 1984·63 cites·8 claims
- 0485US5062680APlate plastics optical waveguideNIPPON TELEGRAPH & TELEPHONE·Filed 1990·Granted Nov 5, 1991·53 cites·20 claims
- 0584US4224046AMethod for manufacturing an optical fiber preformNIPPON TELEGRAPH & TELEPHONE·Filed 1978·Granted Sep 23, 1980·48 cites·7 claims
- 0658US6885823B2Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing methodNTT ELECTRONICS CORP·Filed 2003·Granted Apr 26, 2005·5 cites·21 claims
- 0740US6954562B2Matrix switch of optical waveguide type and method for manufacturing the sameNTT ELECTRONICS CORP·Filed 2004·Granted Oct 11, 2005·0 cites·4 claims
- 0838US2001012424A1Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing methodFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →