Membership
Tour
Register
Log in
Keiko Ichinose
Follow
Person
Yokohama, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Optical information recording medium
Patent number
5,260,165
Issue date
Nov 9, 1993
Ricoh Company, Ltd.
Tsutomu Satou
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording medium, information recording method...
Patent number
5,002,812
Issue date
Mar 26, 1991
Ricoh Company, Ltd.
Masaakira Umehara
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording medium
Patent number
4,737,444
Issue date
Apr 12, 1988
Ricoh Company, Ltd.
Tsutomu Satoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording medium
Patent number
4,735,839
Issue date
Apr 5, 1988
Ricoh Co., Ltd.
Tsutomu Sato
G11 - INFORMATION STORAGE