Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Modulation, demodulation and antenna coupling circuits used in IC card reading/writing apparatus, and method of supplying power to the IC card

Modulation, demodulation and antenna coupling circuits used in IC card reading/writing apparatus, and method of supplying power to the IC card

US Patent 5671254 · Granted Sep 23, 1997

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Communication system, authentication method, information processing device, info2013
Non-contact type IC card1999
Modulation, demodulation and antenna coupling circuits used in IC card reading/w1999
Modulation, demodulation and antenna coupling circuits used in IC card reading/w1999
Noncontact IC card interface unit and communication system using the interface u1997
Signal receiving coil and non-contact type IC card using the same1995
Non-contact IC card1995
IC card and method of checking personal identification number of the same1994
Antenna circuit for non-contact IC card and method of manufacturing the same1994
Non-contact IC card1994
IC card for prevention of fraudulent use1994
Non-contact IC card and method of using the same1993