Inventor · disambiguated record
Hisashi Toyoshima
Also filed as: TOYOSHIMA HISASHI
8 granted patents·8 pending applications·649 citations·filing 1998–2005
90Inventor score
Top patents by PatentIndex Score
16 records- 0197US6499105B1Digital data authentication methodHITACHI LTD·Filed 2000·Granted Dec 24, 2002·174 cites·60 claims
- 0297US6131162ADigital data authentication methodHITACHI LTD·Filed 1998·Granted Oct 10, 2000·388 cites·63 claims
- 0379US7694126B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2005·Granted Apr 6, 2010·7 cites·11 claims
- 0475US7200682B2Time stamp generating systemHITACHI LTD·Filed 2002·Granted Apr 3, 2007·21 cites·8 claims
- 0574US7210043B2Trusted computer systemHITACHI LTD·Filed 2002·Granted Apr 24, 2007·21 cites·16 claims
- 0674US7134021B2Method and system for recovering the validity of cryptographically signed digital dataHITACHI LTD·Filed 2001·Granted Nov 7, 2006·16 cites·40 claims
- 0773US7010569B2Method of information display and communication system using the methodHITACHI LTD·Filed 2001·Granted Mar 7, 2006·19 cites·3 claims
- 0852US2005182939A1Digital data authentication methodFiled 2005·Application pending·0 cites
- 0942US7406528B2Method for communicationHITACHI LTD·Filed 2002·Granted Jul 29, 2008·3 cites·16 claims
- 1041US2002095579A1Digital data authentication methodFiled 2002·Application pending·0 cites
- 1141US2003084294A1System and method for authenticationFiled 2002·Application pending·0 cites
- 1239US2001027450A1Method of detecting changed contentsFiled 2001·Application pending·0 cites
- 1339US2006117183A1Digital image data authenticity assuring method, and digital image data disclosure systemHATANO YASUO·Filed 2005·Application pending·0 cites
- 1438US2002038423A1Method of managing an electronic mark using an agentFiled 2001·Application pending·0 cites
- 1537US2002129255A1Digital signature or electronic seal authentication system and recognized mark management programFiled 2002·Application pending·0 cites
- 1632US2002002682A1Data display method and systemFiled 2001·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Hisashi Toyoshima files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →