Hiroyuki Hayakawa

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Digital information processing method
- Patent number 7,196,986
- Issue date Mar 27, 2007
- Hitachi, Ltd.
- Hiroyuki Hayakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for digital information processing
- Patent number 6,816,444
- Issue date Nov 9, 2004
- Hitachi, Ltd.
- Hiroyuki Hayakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording/reproducing method and device with supplementary data sto...
- Patent number 6,445,654
- Issue date Sep 3, 2002
- Hitachi, Ltd.
- Hiroyuki Hayakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Communication system for encrypted data and apparatus for selective...
- Patent number 6,363,210
- Issue date Mar 26, 2002
- Hitachi, Ltd.
- Hitoaki Owashi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Interactive chargeable communication system with billing system the...
- Patent number 6,249,532
- Issue date Jun 19, 2001
- Hitachi, Ltd.
- Kazuhiko Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Interactive chargeable communication system with billing system the...
- Patent number 6,002,694
- Issue date Dec 14, 1999
- Hitachi, Ltd.
- Kazuhiko Yoshizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for selectively recording and reproducing received analog...
- Patent number 5,903,704
- Issue date May 11, 1999
- Hitachi, Ltd.
- Hitoaki Owashi
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus for digital information processing
- Publication number 20050047293
- Publication date Mar 3, 2005
- Hitachi, Ltd
- Hiroyuki Hayakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hiroyuki Hayakawa

Person

Patents Grantslast 30 patents

Digital information processing method

Method and apparatus for digital information processing

Recording/reproducing method and device with supplementary data sto...

Communication system for encrypted data and apparatus for selective...

Interactive chargeable communication system with billing system the...

Interactive chargeable communication system with billing system the...

Apparatus for selectively recording and reproducing received analog...

Patents Applicationslast 30 patents

Method and apparatus for digital information processing