Inventor · disambiguated record
Kei Karasawa
Also filed as: KARASAWA KEI
6 granted patents·63 citations·filing 2004–2008
82Inventor score
Technology areasH04L
Top patents by PatentIndex Score
6 records- 0180US8595816B2User authentication system and method for the sameKARASAWA KEI·Filed 2008·Granted Nov 26, 2013·13 cites·21 claims
- 0279US8291231B2Common key setting method, relay apparatus, and programUENO NACHI·Filed 2008·Granted Oct 16, 2012·15 cites·15 claims
- 0375US8352743B2Client device, key device, service providing apparatus, user authentication system, user authentication method, program, and recording mediumNIPPON TELEGRAPH & TELEPHONE·Filed 2008·Granted Jan 8, 2013·7 cites·23 claims
- 0473US7539858B2Packet encryption substituting device, method thereof, and program recording mediumNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted May 26, 2009·9 cites·17 claims
- 0567US7861288B2User authentication system for providing online services based on the transmission addressNIPPON TELEGRAPH & TELEPHONE·Filed 2004·Granted Dec 28, 2010·17 cites·11 claims
- 0658US8775796B2Certificate authenticating method, certificate issuing device, and authentication deviceKARASAWA KEI·Filed 2008·Granted Jul 8, 2014·2 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →