Inventor · disambiguated record
Yoji Kumazaki
Also filed as: KUMAZAKI YOJI
2 granted patents·2 pending applications·37 citations·filing 2003–2005
60Inventor score
Top patents by PatentIndex Score
4 records- 0186US7401232B2Content playback apparatus method and program and key management apparatus and systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2003·Granted Jul 15, 2008·33 cites·18 claims
- 0254US7860255B2Content distribution server, key assignment method, content output apparatus, and key issuing centerPANASONIC CORP·Filed 2004·Granted Dec 28, 2010·4 cites·13 claims
- 0345US2006165233A1Methods and apparatuses for distributing system secret parameter group and encrypted intermediate key group for generating content encryption and decryption deysNONAKA MASAO·Filed 2004·Application pending·0 cites
- 0439US2009238368A1Key distribution systemMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →