Membership
Tour
Register
Log in
Youichi Takashima
Follow
Person
Yokohama-shi, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Digital watermark embedding method, digital watermark embedding app...
Patent number
7,978,877
Issue date
Jul 12, 2011
Nippon Telegraph and Telephone Corporation
Takao Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital watermark embedding method, digital watermark embedding app...
Patent number
7,860,270
Issue date
Dec 28, 2010
Nippon Telegraph and Telephone Corporation
Takao Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital watermark embedding method, digital watermark embedding app...
Patent number
7,817,818
Issue date
Oct 19, 2010
Nippon Telegraph and Telephone Corporation
Takao Nakamura
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital watermark embedding method, digital watermark embedding app...
Patent number
7,792,323
Issue date
Sep 7, 2010
Nippon Telegraph and Telephone Corporation
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and apparatus for digital watermarking
Patent number
7,640,431
Issue date
Dec 29, 2009
Nippon Telegraph and Telephone Corporation
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and apparatus for evaluating the strength of an encryption
Patent number
7,187,769
Issue date
Mar 6, 2007
Nippon Telegraph and Telephone Public Corporation
Shiho Moriai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Digital watermark embedding method, digital watermark embedding app...
Patent number
7,164,778
Issue date
Jan 16, 2007
Nippon Telegraph and Telephone Corporation
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and apparatus for digital watermarking
Patent number
7,072,492
Issue date
Jul 4, 2006
Nippon Telegraph and Telephone Corporation
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Data converter and recording medium on which program for executing...
Patent number
6,769,063
Issue date
Jul 27, 2004
Nippon Telegraph and Telephone Corporation
Masayuki Kanda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method and apparatus for digital watermarking
Patent number
6,704,431
Issue date
Mar 9, 2004
Nippon Telegraph and Telephone Corporation
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and system for message delivery utilizing zero knowledge int...
Patent number
6,044,463
Issue date
Mar 28, 2000
Nippon Telegraph and Telephone Corporation
Masayuki Kanda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and system for message delivery utilizing zero knowledge int...
Patent number
6,011,848
Issue date
Jan 4, 2000
Nippon Telegraph and Telephone Corporation
Masayuki Kanda
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Method and system for digital information protection
Patent number
5,701,343
Issue date
Dec 23, 1997
Nippon Telegraph & Telephone Corporation
Youichi Takashima
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
Digital watermark embedding method, digital watermark embedding app...
Publication number
20110116679
Publication date
May 19, 2011
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and apparatus for digital watermarking
Publication number
20100131768
Publication date
May 27, 2010
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital watermark embedding method, digital watermark embedding app...
Publication number
20100119106
Publication date
May 13, 2010
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and apparatus for digital watermarking
Publication number
20070067636
Publication date
Mar 22, 2007
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital watermark embedding method, digital watermark embedding app...
Publication number
20060204032
Publication date
Sep 14, 2006
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Digital watermark embedding method, digital watermark embedding app...
Publication number
20060193491
Publication date
Aug 31, 2006
Takao Nakamura
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and apparatus for digital watermarking
Publication number
20050175214
Publication date
Aug 11, 2005
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
Method and apparatus for digital watermarking
Publication number
20040071312
Publication date
Apr 15, 2004
Hiroshi Ogawa
G06 - COMPUTING CALCULATING COUNTING