Ishizuka Yutaka

Person

Nagano, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Spindle motor
- Patent number 6,188,155
- Issue date Feb 13, 2001
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Motor rotor using a cylindrical yoke with slit
- Patent number 6,172,439
- Issue date Jan 9, 2001
- Kabushiki Kaisha Sankyo Seiko Seisakusho
- Yutaka Ishizuka
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Rotary polygon mirror type light deflector
- Patent number 5,933,267
- Issue date Aug 3, 1999
- Kabushiki Kaisha Sankyo Seiki Sisakusho
- Yutaka Ishizuka
- G02 - OPTICS
Information Patent Grant
Rotary polygon mirror optical scanning device
- Patent number 5,910,853
- Issue date Jun 8, 1999
- Sankyo Seiki Mfg. Co., Ltd.
- Ishizuka Yutaka
- G02 - OPTICS
Information Patent Grant
Disk driving device with hub flange secured between yoke and drive...
- Patent number 5,877,918
- Issue date Mar 2, 1999
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Koichi Katakura
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle motor, and its rotor yoke manufacturing method
- Patent number 5,744,881
- Issue date Apr 28, 1998
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Electric motor
- Patent number 5,686,771
- Issue date Nov 11, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Rotary polygon mirror
- Patent number 5,675,430
- Issue date Oct 7, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Rotary polygon mirror type light deflecting system
- Patent number 5,666,219
- Issue date Sep 9, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G02 - OPTICS
Information Patent Grant
Rotary polygon mirror type light deflecting system
- Patent number 5,661,588
- Issue date Aug 26, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G02 - OPTICS
Information Patent Grant
Disk driving motor
- Patent number 5,653,541
- Issue date Aug 5, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Magnetic disk drive motor having a fixed shaft with circumferential...
- Patent number 5,638,233
- Issue date Jun 10, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Magnetic disk drive motor including a fixed shaft having mounted th...
- Patent number 5,636,084
- Issue date Jun 3, 1997
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disc drive motor including a fixed shaft having mounted th...
- Patent number 5,606,475
- Issue date Feb 25, 1997
- Kabushiki Kaisha Sanyo Seiki Seisakusho
- Yutaka Ishizuka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Magnetic disk drive device having a liquid insulating material prov...
- Patent number 5,471,357
- Issue date Nov 28, 1995
- Kabushiki Kaisha Sankyo Seiki Seisakusho
- Yutaka Ishizuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disc drive motor having disc securely fixed to loading sur...
- Patent number 5,450,261
- Issue date Sep 12, 1995
- Kabushiki Kaisha Sankyo Seiki Seisa Kusho
- Yutaka Ishizuka
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Air dynamic pressure bearing and optical deflector
- Publication number 20020060828
- Publication date May 23, 2002
- Yutaka Ishizuka
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
Polygon mirror
- Publication number 20020048097
- Publication date Apr 25, 2002
- Yutaka Ishizuka
- G02 - OPTICS

Ishizuka Yutaka

Person

Patents Grantslast 30 patents

Spindle motor

Motor rotor using a cylindrical yoke with slit

Rotary polygon mirror type light deflector

Rotary polygon mirror optical scanning device

Disk driving device with hub flange secured between yoke and drive...

Spindle motor, and its rotor yoke manufacturing method

Electric motor

Rotary polygon mirror

Rotary polygon mirror type light deflecting system

Rotary polygon mirror type light deflecting system

Disk driving motor

Magnetic disk drive motor having a fixed shaft with circumferential...

Magnetic disk drive motor including a fixed shaft having mounted th...

Magnetic disc drive motor including a fixed shaft having mounted th...

Magnetic disk drive device having a liquid insulating material prov...

Magnetic disc drive motor having disc securely fixed to loading sur...

Patents Applicationslast 30 patents

Air dynamic pressure bearing and optical deflector

Polygon mirror