Katsumi Marukawa

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Patents Grantslast 30 patents

Information Patent Grant
Question-answering method and question-answering apparatus
- Patent number 7,236,968
- Issue date Jun 26, 2007
- Hitachi, Ltd.
- Minenobu Seki
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Document processing apparatus and method for inputting the requirem...
- Patent number 5,835,922
- Issue date Nov 10, 1998
- Hitachi, Ltd.
- Yoshihiro Shima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Character recognition method and apparatus
- Patent number 5,768,451
- Issue date Jun 16, 1998
- Hitachi, Ltd.
- Toru Hisamitsu
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Document recognition method and system
- Patent number 5,717,794
- Issue date Feb 10, 1998
- Hitachi, Ltd.
- Masashi Koga
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Question-answering method and question-answering apparatus
- Publication number 20050060301
- Publication date Mar 17, 2005
- Hitachi, Ltd.
- Minenobu Seki
- G06 - COMPUTING CALCULATING COUNTING