Membership
Tour
Register
Log in
Akio Hirai
Follow
Person
Hamamatsu, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Optical disk capable of disabling incompatible recorder
Patent number
7,277,369
Issue date
Oct 2, 2007
Yamaha Corporation
Morihiro Murata
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc reading device
Patent number
5,812,502
Issue date
Sep 22, 1998
Yamaha Corporation
Akio Hirai
G11 - INFORMATION STORAGE