Katsuyuki Utaka

Person

Musashino, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Coupled waveguide structure
- Patent number 6,084,997
- Issue date Jul 4, 2000
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- G02 - OPTICS
Information Patent Grant
Functional semiconductor element with avalanche multiplication
- Patent number 5,952,683
- Issue date Sep 14, 1999
- Kokusai Denshin Denwa Kabushiki Kaisha
- Haruhisa Sakata
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical functional semiconductor element
- Patent number 5,663,572
- Issue date Sep 2, 1997
- Kokusai Denshin Denwa Kabushiki Kaisha
- Haruhisa Sakata
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical Mach-Zehnder type logic element which performs an XOR opera...
- Patent number 5,315,422
- Issue date May 24, 1994
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor element having opposite signs of .alpha. parameter
- Patent number 5,208,822
- Issue date May 4, 1993
- Kokusai Denshin Denwa Co., Ltd.
- Hermann A. Haus
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Tunable semiconductor laser
- Patent number 5,187,717
- Issue date Feb 16, 1993
- Kokusai Denshin Denwa Kabushiki Kaisha
- Masayoshi Horita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Quantum well structure and semiconductor device using the same
- Patent number 5,122,844
- Issue date Jun 16, 1992
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Method for the manufacture of optical semiconductor device
- Patent number 5,019,519
- Issue date May 28, 1991
- Kokusai Denshin Denwa Kabushiki Kaisha
- Hideaki Tanaka
- G02 - OPTICS
Information Patent Grant
Optical modulation element
- Patent number 4,946,243
- Issue date Aug 7, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Masatoshi Suzuki
- G02 - OPTICS
Information Patent Grant
Light triggering switch
- Patent number 4,923,265
- Issue date May 8, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- G02 - OPTICS
Information Patent Grant
Infrared emitting device with dislocation free layer
- Patent number 4,918,496
- Issue date Apr 17, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Yuichi Matsushima
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical modulation device
- Patent number 4,913,506
- Issue date Apr 3, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Masatoshi Suzuki
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor optical amplifying element
- Patent number 4,897,845
- Issue date Jan 30, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical packet switching system using multi-stage combination of li...
- Patent number 4,894,818
- Issue date Jan 16, 1990
- Kokusai Denshin Denwa Kabushiki Kaisha
- Masanobu Fujioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Variable-waveguide optical branching filter
- Patent number 4,874,216
- Issue date Oct 17, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- G02 - OPTICS
Information Patent Grant
Wavelength tunable semiconductor laser with narrow band-pass active...
- Patent number 4,852,108
- Issue date Jul 25, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Variable wavelength semiconductor laser
- Patent number 4,829,535
- Issue date May 9, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method for manufacturing diffraction grating
- Patent number 4,826,291
- Issue date May 2, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- G02 - OPTICS
Information Patent Grant
Distributed feedback semiconductor laser with monitor
- Patent number 4,815,090
- Issue date Mar 21, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Masashi Usami
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical waveguide switch
- Patent number 4,805,975
- Issue date Feb 21, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- G02 - OPTICS
Information Patent Grant
Semiconductor optical switch
- Patent number 4,795,225
- Issue date Jan 3, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Kazuo Sakai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Light emitting device
- Patent number 4,773,075
- Issue date Sep 20, 1988
- Kukusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- G02 - OPTICS
Information Patent Grant
Optical external modulation semiconductor element
- Patent number 4,743,087
- Issue date May 10, 1988
- Kokusai Denshin Denwa Kabushiki Kaisha
- Katsuyuki Utaka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Integrated semiconductor light emitting element with oscillation wa...
- Patent number 4,720,835
- Issue date Jan 19, 1988
- Kokusai Denshin Denwa K.K.
- Shigeyuki Akiba
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed feedback semiconductor laser
- Patent number 4,701,930
- Issue date Oct 20, 1987
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multi-layered semi-conductor photodetector
- Patent number 4,682,196
- Issue date Jul 21, 1987
- Kokusai Denshin Denwa Kabushiki Kaisha
- Kazuo Sakai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed feedback semiconductor laser
- Patent number 4,665,527
- Issue date May 12, 1987
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method for manufacturing diffraction grating
- Patent number 4,660,934
- Issue date Apr 28, 1987
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- G02 - OPTICS
Information Patent Grant
Distributed feedback semiconductor laser
- Patent number 4,653,059
- Issue date Mar 24, 1987
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed feedback semiconductor laser with monitor
- Patent number 4,653,058
- Issue date Mar 24, 1987
- 501 Kokusai Denshin Denwa Kabushiki Kaisha
- Shigeyuki Akiba
- H01 - BASIC ELECTRIC ELEMENTS

Katsuyuki Utaka

Person

Patents Grantslast 30 patents

Coupled waveguide structure

Functional semiconductor element with avalanche multiplication

Optical functional semiconductor element

Optical Mach-Zehnder type logic element which performs an XOR opera...

Semiconductor element having opposite signs of .alpha. parameter

Tunable semiconductor laser

Quantum well structure and semiconductor device using the same

Method for the manufacture of optical semiconductor device

Optical modulation element

Light triggering switch

Infrared emitting device with dislocation free layer

Optical modulation device

Semiconductor optical amplifying element

Optical packet switching system using multi-stage combination of li...

Variable-waveguide optical branching filter

Wavelength tunable semiconductor laser with narrow band-pass active...

Variable wavelength semiconductor laser

Method for manufacturing diffraction grating

Distributed feedback semiconductor laser with monitor

Optical waveguide switch

Semiconductor optical switch

Light emitting device

Optical external modulation semiconductor element

Integrated semiconductor light emitting element with oscillation wa...

Distributed feedback semiconductor laser

Multi-layered semi-conductor photodetector

Distributed feedback semiconductor laser

Method for manufacturing diffraction grating

Distributed feedback semiconductor laser

Distributed feedback semiconductor laser with monitor