Hirose; Chisai

Patent Applications and Registrations

Patent applications and USPTO patent grants for Hirose; Chisai.The latest application filed is for "planar lightwave circuit type variable optical attenuator".

Company Profile

0.6.5

Hirose; Chisai - Yokohama JP
Hirose; Chisai - Kanagawa JP
Hirose, Chisai - Yokohama-shi 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
Planar lightwave circuit type variable optical attenuator Grant 6,819,859 - Hatayama , et al. November 16, 2	2004-11-16
Apparatus for and method of monitoring wavelength multiplexed signal light as well as optical transmission system using the same Grant 6,782,168 - Hatayama , et al. August 24, 2	2004-08-24
Silica based optical waveguide and production method therefor Grant 6,690,872 - Sasaki , et al. February 10, 2	2004-02-10
Optical device and control method thereof Grant 6,643,431 - Hatayama , et al. November 4, 2	2003-11-04
Optical filter Grant 6,560,381 - Hatayama , et al. May 6, 2	2003-05-06
Planar lightwave circuit type variable optical attenuator App 20030016938 - Hatayama, Hitoshi ; et al.	2003-01-23
Apparatus for and method of monitoring wavelength multiplexed signal light as well as optical transmission system using the same App 20030002798 - Hatayama, Hitoshi ; et al.	2003-01-02
Optical device and control method thereof App 20020164124 - Hatayama, Hitoshi ; et al.	2002-11-07
Optical filter App 20020021856 - Hatayama, Hitoshi ; et al.	2002-02-21
Silica based optical waveguide and production method therefor App 20010007606 - Sasaki, Takashi ; et al.	2001-07-12
Method for fabricating an optical waveguide Grant 5,556,442 - Kanamori , et al. September 17, 1	1996-09-17

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