Mitsuo Takahashi

Person

Matsudo-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical attenuator
- Patent number 6,776,534
- Issue date Aug 17, 2004
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Wedged and lensed optical fiber
- Patent number 6,724,959
- Issue date Apr 20, 2004
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical multiplexing/demultiplexing device with variable branching...
- Patent number 6,563,987
- Issue date May 13, 2003
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Reflecting-mirror-type variable optical attenuator
- Patent number 6,483,982
- Issue date Nov 19, 2002
- Seikon Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Reflection mirror type optical fiber switch
- Patent number 6,477,292
- Issue date Nov 5, 2002
- Seikoh Giken Co., LTD
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Variable attenuation type optical power attenuator with latching ra...
- Patent number 6,341,191
- Issue date Jan 22, 2002
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Rotary switch type optical fiber switch
- Patent number 6,335,993
- Issue date Jan 1, 2002
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical fiber switch
- Patent number 6,307,982
- Issue date Oct 23, 2001
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical fiber switch circuit
- Patent number 6,266,461
- Issue date Jul 24, 2001
- Seikoh Giken Co., LTD
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Apparatus for polishing end surface of optical fibers
- Patent number 6,257,971
- Issue date Jul 10, 2001
- Seikoh Giken Co., LTD
- Mitsuo Takahashi
- B24 - GRINDING POLISHING
Information Patent Grant
Optical fiber end surface polishing apparatus
- Patent number 6,165,055
- Issue date Dec 26, 2000
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
2.times.2 optical fiber switch
- Patent number 6,160,929
- Issue date Dec 12, 2000
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
N.times.2N optical fiber switch
- Patent number 6,144,782
- Issue date Nov 7, 2000
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Disk injection mold apparatus having mold opening guide means
- Patent number 6,126,434
- Issue date Oct 3, 2000
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical fiber light source assembly and manufacturing method for th...
- Patent number 6,113,284
- Issue date Sep 5, 2000
- Seikoh Giken Co., Ltd.
- Yuying Wu
- G02 - OPTICS
Information Patent Grant
Stamper plate attaching/detaching device of an injection mold for f...
- Patent number 6,019,587
- Issue date Feb 1, 2000
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Disk injection mold apparatus having mold opening guide means
- Patent number 5,869,111
- Issue date Feb 9, 1999
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical device and bidirectional communications system
- Patent number 5,859,940
- Issue date Jan 12, 1999
- Seiko Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical device having a slant connecting end surface
- Patent number 5,809,193
- Issue date Sep 15, 1998
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Stamper plate mounting device of an injection mold for making an op...
- Patent number 5,798,122
- Issue date Aug 25, 1998
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Optical disk molding apparatus equipped with liquid sealing means
- Patent number 5,792,492
- Issue date Aug 11, 1998
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Cooling device of an injection mold for making an optical disk subs...
- Patent number 5,783,233
- Issue date Jul 21, 1998
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Means for holding a stamper plate in a molding metal die
- Patent number 5,766,652
- Issue date Jun 16, 1998
- Seiko Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Cavity plates aligning and guiding apparatus in disk injection mold...
- Patent number 5,753,275
- Issue date May 19, 1998
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Four polarization maintaining optical fiber ferrule and optical cou...
- Patent number 5,692,081
- Issue date Nov 25, 1997
- Seikon Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical fiber ferrule and optical coupler
- Patent number 5,682,452
- Issue date Oct 28, 1997
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical attenuation fiber assembly
- Patent number 5,677,976
- Issue date Oct 14, 1997
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical coupler constructed using optical fiber ferrules
- Patent number 5,675,683
- Issue date Oct 7, 1997
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical fiber ferrule assembly having angular index showing polariz...
- Patent number 5,668,905
- Issue date Sep 16, 1997
- Seikoh Giken Co., Ltd.
- Mitsuo Takahashi
- G02 - OPTICS
Information Patent Grant
Optical fiber ferrule holding plate for optical fiber end polishing...
- Patent number 5,640,475
- Issue date Jun 17, 1997
- Seiko Giken Co., Ltd.
- Mitsuo Takahashi
- B24 - GRINDING POLISHING

Patents Applicationslast 30 patents

Information Patent Application
Optical attenuator
- Publication number 20020106180
- Publication date Aug 8, 2002
- Mitsuo Takahashi
- G02 - OPTICS

Mitsuo Takahashi

Person

Patents Grantslast 30 patents

Optical attenuator

Wedged and lensed optical fiber

Optical multiplexing/demultiplexing device with variable branching...

Reflecting-mirror-type variable optical attenuator

Reflection mirror type optical fiber switch

Variable attenuation type optical power attenuator with latching ra...

Rotary switch type optical fiber switch

Optical fiber switch

Optical fiber switch circuit

Apparatus for polishing end surface of optical fibers

Optical fiber end surface polishing apparatus

2.times.2 optical fiber switch

N.times.2N optical fiber switch

Disk injection mold apparatus having mold opening guide means

Optical fiber light source assembly and manufacturing method for th...

Stamper plate attaching/detaching device of an injection mold for f...

Disk injection mold apparatus having mold opening guide means

Optical device and bidirectional communications system

Optical device having a slant connecting end surface

Stamper plate mounting device of an injection mold for making an op...

Optical disk molding apparatus equipped with liquid sealing means

Cooling device of an injection mold for making an optical disk subs...

Means for holding a stamper plate in a molding metal die

Cavity plates aligning and guiding apparatus in disk injection mold...

Four polarization maintaining optical fiber ferrule and optical cou...

Optical fiber ferrule and optical coupler

Optical attenuation fiber assembly

Optical coupler constructed using optical fiber ferrules

Optical fiber ferrule assembly having angular index showing polariz...

Optical fiber ferrule holding plate for optical fiber end polishing...

Patents Applicationslast 30 patents

Optical attenuator