Inventor
KAWAI SHIGEYUKI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “KAWAI SHIGEYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
5 patentsUS6764001B1Jul 20, 2004
Electronic money system and transaction method using the same
SONY CORP40 citations95
US7475044B1Jan 6, 2009
Electronic money system and electronic money terminal device
SONY CORP37 citations92
US7328840B2Feb 12, 2008
Electronic money system and transaction method using the same
SONY CORP5 citations73
US7418425B2Aug 26, 2008
Information processing system, information processing method, electronic money service providing system, and recording medium
SONY CORP6 citations60
US7900825B2Mar 8, 2011
Electronic money system and transaction method using the same
SONY CORP0 citations51