Assignee
SAKAMURA KEN
JP13 patents
Top patents by PatentIndex Score
US8306919B2Nov 6, 2012
IC card and authentication method in electronic ticket distribution system
SAKAMURA KEN46 citations97
US7580897B2Aug 25, 2009
IC card and authentication method in electronic ticket distribution system
SAKAMURA KEN21 citations92
US7357329B2Apr 15, 2008
IC card, terminal device, and data communication method
SAKAMURA KEN11 citations84
US7346718B2Mar 18, 2008
Autonomous integrated-circuit card
SAKAMURA KEN14 citations84
US8122261B2Feb 21, 2012
Data communication apparatus and data communication method
SAKAMURA KEN7 citations83
US5210835AMay 11, 1993
Data processing system having apparatus for increasing the execution speed of bit field instructions
SAKAMURA KEN8 citations73
US4941085AJul 10, 1990
Data processing system having apparatus for increasing the execution speed of bit field instructions
SAKAMURA KEN9 citations73
US4926321AMay 15, 1990
Method of searching a queue in response to a search instruction
SAKAMURA KEN9 citations73
US5398319AMar 14, 1995
Microprocessor having apparatus for dynamically controlling a kind of operation to be performed by instructions to be executed
SAKAMURA KEN5 citations62
US7416114B2Aug 26, 2008
Electronic value transfer device equipped with non-contact IC interface
SAKAMURA KEN1 citations52
US7340243B2Mar 4, 2008
Connection information management system for managing connection information used in communications between IC cards
SAKAMURA KEN1 citations52
US8468094B2Jun 18, 2013
Electronic value exchange system, mobile terminal, and electronic value exchange method
SAKAMURA KEN0 citations41
US8161499B2Apr 17, 2012
Data processing device and data processing method
SAKAMURA KEN0 citations41