Membership
Tour
Register
Log in
Tatsuaki Sakurai
Follow
Person
Yokohama, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Signal operational circuit for a multi-beam pick-up device
Patent number
6,353,583
Issue date
Mar 5, 2002
Ricoh Company, Ltd.
Ryuuji Kudoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup apparatus for accurate detection of a tracking error...
Patent number
6,128,259
Issue date
Oct 3, 2000
Ricoh Co., Ltd.
Masaaki Sofue
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for changing laser beam power of an optical st...
Patent number
5,991,251
Issue date
Nov 23, 1999
Ricoh Company, Ltd.
Tatsuaki Sakurai
G11 - INFORMATION STORAGE
Information
Patent Grant
Multibeam optical pickup and servo method thereof
Patent number
5,341,355
Issue date
Aug 23, 1994
Ricoh Company, Ltd.
Hiroshi Gotoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Multi-beam optical pick-up
Patent number
5,105,410
Issue date
Apr 14, 1992
Ricoh Company, Ltd.
Ikuo Maeda
G11 - INFORMATION STORAGE