Registers – Records – Conductive
Reexamination Certificate
2007-08-07
2007-08-07
Le, Thien M. (Department: 2876)
Registers
Records
Conductive
Reexamination Certificate
active
11058526
ABSTRACT:
A radio frequency identification system is provided having a data communication device and a contactless identification tag. The data communication device has an antenna coil, a first data receiving unit, a first data transmitting unit, a first data control unit, and a first data storing unit. Further, the contactless identification tag has an antenna coil, a second data receiving unit, a second data transmitting unit, a second data control unit, a second data storing unit, and a driving power generating unit. The first data control unit generates negative logic digital signals of transmission data. The first data transmitting unit modulates the digital signals and transmits the modulated signals.
REFERENCES:
patent: 5345231 (1994-09-01), Koo et al.
patent: 5874725 (1999-02-01), Yamaguchi
patent: 6088741 (2000-07-01), Murata
patent: 6747548 (2004-06-01), Yamaguchi
patent: 6960985 (2005-11-01), Wuidart
patent: 06-096300 (1994-04-01), None
patent: 08-162997 (1996-06-01), None
RFID Handbook (Japanese Edition)(Second Edition), (pp. 176-180; Sections 9.2.2.1 and 9.2.2.2) and English translation.
RFID Handbook (Japanese Edition), Klaus Finkenzeller, translated by Software Engineering Laboratory co. Ltd and published by the Nikkan Kogyo Shimbun, Ltd.
Harness & Dickey & Pierce P.L.C.
Le Thien M.
Seiko Epson Corporation
Taylor April
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