Izawa; Tatsuo

Patent Applications and Registrations

Patent applications and USPTO patent grants for Izawa; Tatsuo.The latest application filed is for "matrix switch of optical waveguide type and method for manufacturing the same".

Company Profile

0.6.3

Izawa; Tatsuo - Tokyo JP
Izawa; Tatsuo - Musashino JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Matrix switch of optical waveguide type and method for manufacturing the same Grant 6,954,562 - Izawa , et al. October 11, 2	2005-10-11
Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method Grant 6,885,823 - Kato , et al. April 26, 2	2005-04-26
Matrix switch of optical waveguide type and method for manufacturing the same App 20040141679 - Izawa, Tatsuo ; et al.	2004-07-22
Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method App 20030202742 - Kato, Kuniharu ; et al.	2003-10-30
Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method App 20010012424 - Kato, Kuniharu ; et al.	2001-08-09
Plate plastics optical waveguide Grant 5,062,680 - Imamura , et al. November 5, 1	1991-11-05
Method of making glass waveguide for optical circuit Grant 4,425,146 - Izawa , et al. January 10, 1	1984-01-10
Method for manufacturing an optical fibre Grant 3,957,474 - Kobayashi , et al. May 18, 1	1976-05-18
Method for forming optical waveguides Grant 3,880,630 - Izawa April 29, 1	1975-04-29

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