Akihiko Yoshizawa

Person

Hachioji, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical pick-up head and integrated type optical unit for use in op...
- Patent number 5,898,167
- Issue date Apr 27, 1999
- Olympus Optical Co., Ltd.
- Toru Musha
- G02 - OPTICS
Information Patent Grant
Optical pick-up head and integrated type optical unit for use in op...
- Patent number 5,814,807
- Issue date Sep 29, 1998
- Olympus Optical Co., Ltd.
- Toru Musha
- G02 - OPTICS
Information Patent Grant
Optical pick-up head and integrated type optical unit for use in op...
- Patent number 5,804,814
- Issue date Sep 8, 1998
- Toru Musha
- G02 - OPTICS
Information Patent Grant
Polarizing beam splitter and optical pick-up head comprising the same
- Patent number 5,631,774
- Issue date May 20, 1997
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G02 - OPTICS
Information Patent Grant
Apparatus using an optical pickup
- Patent number 5,566,142
- Issue date Oct 15, 1996
- Olympus Optical Co., Ltd.
- Junichi Nakano
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of measuring phase difference of opto-magnetic record medium...
- Patent number 5,432,760
- Issue date Jul 11, 1995
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for detecting and measuring the refractive ind...
- Patent number 5,028,774
- Issue date Jul 2, 1991
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G01 - MEASURING TESTING
Information Patent Grant
Optical characteristic measuring apparatus for an optical recording...
- Patent number 4,841,510
- Issue date Jun 20, 1989
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording reproducing device having field applying...
- Patent number 4,837,758
- Issue date Jun 6, 1989
- Olympus Optical Co., Ltd.
- Kazuyasu Motoyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus for measuring the refractive index of a substrate for an...
- Patent number 4,792,227
- Issue date Dec 20, 1988
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording media substrate
- Patent number 4,788,678
- Issue date Nov 29, 1988
- Olympus Optical Co., Ltd.
- Akihiko Yoshizawa
- G11 - INFORMATION STORAGE

Akihiko Yoshizawa

Person

Patents Grantslast 30 patents

Optical pick-up head and integrated type optical unit for use in op...

Optical pick-up head and integrated type optical unit for use in op...

Optical pick-up head and integrated type optical unit for use in op...

Polarizing beam splitter and optical pick-up head comprising the same

Apparatus using an optical pickup

Method of measuring phase difference of opto-magnetic record medium...

Method and apparatus for detecting and measuring the refractive ind...

Optical characteristic measuring apparatus for an optical recording...

Magneto-optical recording reproducing device having field applying...

Apparatus for measuring the refractive index of a substrate for an...

Optical information recording media substrate