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Keisuke ASAMI
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Musashino-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Bidirectional optical module and optical time domain reflectometer...
Patent number
7,889,331
Issue date
Feb 15, 2011
Yokogawa Electric Corporation
Keisuke Asami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength tunable light source
Patent number
6,850,545
Issue date
Feb 1, 2005
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light source for an external cavity laser
Patent number
6,700,904
Issue date
Mar 2, 2004
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Wavelength-variable light source, and optical component loss measur...
Patent number
6,600,762
Issue date
Jul 29, 2003
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
V-groove grating mirror and external resonator type wavelength vari...
Patent number
6,597,507
Issue date
Jul 22, 2003
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
External cavity laser type light source
Patent number
6,568,105
Issue date
May 27, 2003
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical interferometer
Patent number
6,552,801
Issue date
Apr 22, 2003
Ando Electric Co., Ltd.
Fumio Akikuni
G01 - MEASURING TESTING
Information
Patent Grant
External cavity type light source
Patent number
6,407,869
Issue date
Jun 18, 2002
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Tunable semiconductor laser light source
Patent number
6,295,306
Issue date
Sep 25, 2001
Ando Electric Co., Ltd.
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optocoupler
Patent number
5,926,593
Issue date
Jul 20, 1999
Ando Electric Co., Ltd.
Keisuke Asami
G02 - OPTICS
Information
Patent Grant
Method of receiving light and light receiving module of less polari...
Patent number
5,604,636
Issue date
Feb 18, 1997
Ando Electric Co., Ltd.
Keisuke Asami
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
WAVELENGTH TUNABLE LIGHT SOURCE OF EXTERNAL RESONATOR TYPE
Publication number
20090022184
Publication date
Jan 22, 2009
Yokogawa Electric Corporation
Akishige ITO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
BIDIRECTIONAL OPTICAL MODULE AND OPTICAL TIME DOMAIN REFLECTOMETER...
Publication number
20080055589
Publication date
Mar 6, 2008
YOKOGAWA ELECTRIC CORPORATION
Keisuke Asami
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Tunable laser source
Publication number
20050094681
Publication date
May 5, 2005
Shosuke Miyaki
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Tunable filter
Publication number
20040208448
Publication date
Oct 21, 2004
Keisuke Asami
G02 - OPTICS
Information
Patent Application
Wavelength tunable light source
Publication number
20040013138
Publication date
Jan 22, 2004
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Crosstalk improvement module and its using method
Publication number
20040001660
Publication date
Jan 1, 2004
Keisuke Asami
G02 - OPTICS
Information
Patent Application
Tunable filter with wavelength monitor
Publication number
20030067601
Publication date
Apr 10, 2003
Keisuke Asami
G01 - MEASURING TESTING
Information
Patent Application
Polarization analyzing apparatus capable of outputting light in ana...
Publication number
20030048973
Publication date
Mar 13, 2003
Keisuke Asami
G01 - MEASURING TESTING
Information
Patent Application
Tunable filter
Publication number
20020126385
Publication date
Sep 12, 2002
Keisuke Asami
G01 - MEASURING TESTING
Information
Patent Application
Fabry-perot etalon, wavelength measuring apparatus, and wavelength...
Publication number
20020081065
Publication date
Jun 27, 2002
Ando Electric Co., Ltd.
Keisuke Asami
G01 - MEASURING TESTING
Information
Patent Application
Wavelength measuring apparatus and wavelength tunable light source...
Publication number
20020080367
Publication date
Jun 27, 2002
Ando Electric Co., Ltd.
Keisuke Asami
G01 - MEASURING TESTING
Information
Patent Application
Wavelength-variable light source, and optical component loss measur...
Publication number
20020024977
Publication date
Feb 28, 2002
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Light source for an external cavity laser
Publication number
20010026568
Publication date
Oct 4, 2001
Keisuke Asami
H01 - BASIC ELECTRIC ELEMENTS