Inventor · disambiguated record
Katsumi Marukawa
Also filed as: MARUKAWA KATSUMI
5 granted patents·292 citations·filing 1996–2004
84Inventor score
Files withHITACHI LTD5
Top patents by PatentIndex Score
5 records- 0178US7236968B2Question-answering method and question-answering apparatusHITACHI LTD·Filed 2004·Granted Jun 26, 2007·43 cites·16 claims
- 0274US5835922ADocument processing apparatus and method for inputting the requirements of a reader or writer and for processing documents according to the requirementsHITACHI LTD·Filed 1997·Granted Nov 10, 1998·89 cites·9 claims
- 0374US5717794ADocument recognition method and systemHITACHI LTD·Filed 1996·Granted Feb 10, 1998·111 cites·21 claims
- 0454US5768451ACharacter recognition method and apparatusHITACHI LTD·Filed 1997·Granted Jun 16, 1998·48 cites·7 claims
- 0548US7080252B2Method and apparatus for secure data transmission via networkHITACHI LTD·Filed 2001·Granted Jul 18, 2006·1 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →