Akihiko Koga

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Role managed collaborative learning support system and method
- Patent number 6,965,751
- Issue date Nov 15, 2005
- Hitachi, Ltd.
- Akihiko Koga
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Method for supporting user operation
- Patent number 5,978,595
- Issue date Nov 2, 1999
- Hitachi, Ltd.
- Tadashi Tanaka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Method for editing and executing computer programs
- Patent number 5,065,400
- Issue date Nov 12, 1991
- Hitachi, Ltd.
- Tetsuya Masuishi
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
PROGRAM CREATION SUPPORT APPARATUS, CREATION SUPPORT PROGRAM AND CR...
- Publication number 20080216075
- Publication date Sep 4, 2008
- Kenji Ogasawara
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
System and method for controlling cooperation learning state
- Publication number 20020160350
- Publication date Oct 31, 2002
- Tadashi Tanaka
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Role managed collaborative learning support system and method
- Publication number 20020146675
- Publication date Oct 10, 2002
- Akihiko Koga
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS