Electronic credential signal activation systems and methods
MA Cox - US Patent 10,964,146, 2021 - Google Patents
An circuit includes a first inductive coil and a second inductive coil each including a plurality
of metal traces. The first and second inductive coils are each configured to receive a first …
of metal traces. The first and second inductive coils are each configured to receive a first …
Rfid card with piezoelectric element
JW Spivey - US Patent App. 12/334,442, 2009 - Google Patents
A radio-frequency identification (RFID) card includes an RFID element that is adapted to
store RFID data information, an antenna, electrically connected at each of two ends to the …
store RFID data information, an antenna, electrically connected at each of two ends to the …
Voltage converter
L Zoescher - US Patent 9,716,443, 2017 - Google Patents
BACKGROUND Radio frequency transponders (often referred to as RFID transponders or
tags) may be classified in a number of ways including: operating frequency, the coupling …
tags) may be classified in a number of ways including: operating frequency, the coupling …
Integrated circuit and method to secure a RFID tag
JW Spivey - US Patent 7,940,184, 2011 - Google Patents
(57) ABSTRACT A method to secure RFID card information consisting of a piezo electric
element coupled to a transistor which is coupled across the antenna leads of a RFID tag, the …
element coupled to a transistor which is coupled across the antenna leads of a RFID tag, the …
Electronic credential signal activation systems and methods
MA Cox - US Patent 10,255,734, 2019 - Google Patents
An circuit includes a first inductive coil and a second inductive coil each including a plurality
of metal traces. The first and second inductive coils are each configured to receive a first …
of metal traces. The first and second inductive coils are each configured to receive a first …
Overvoltage protection for NFC devices
B Sheikholeslami - US Patent 9,787,088, 2017 - Google Patents
The present application relates to a near field communica tion (NFC) device which has an
antenna for receiving NFC signals. The NFC device includes a protection system for …
antenna for receiving NFC signals. The NFC device includes a protection system for …
Nfc or rfid based sensor measurement device and measuring method using the same
CM Kyung, HT Cho, SR Lee - US Patent App. 14/073,539, 2015 - Google Patents
SUMMARY OF THE INVENTION I0010. An object of the present invention is to provide a
near field communication (NFC) or radio frequency identifi cation (RFID) based sensor …
near field communication (NFC) or radio frequency identifi cation (RFID) based sensor …
Electronic credential signal activation systems and methods
MA Cox - US Patent 11,734,979, 2023 - Google Patents
An circuit includes a first inductive coil and a second inductive coil each including a plurality
of metal traces. The first and second inductive coils are each configured to receive a first …
of metal traces. The first and second inductive coils are each configured to receive a first …
Electronic credential signal activation systems and methods
MA Cox - US Patent 11,417,162, 2022 - Google Patents
An circuit includes a first inductive coil and a second inductive coil each including a plurality
of metal traces. The first and second inductive coils are each configured to receive a first …
of metal traces. The first and second inductive coils are each configured to receive a first …
Overvoltage protection with power sink
QC Ge - US Patent 8,406,417, 2013 - Google Patents
BACKGROUND The disclosed Subject matter relates generally to telecom munications and,
more particularly, to an overvoltage protec tion circuit with a power sink. In communications …
more particularly, to an overvoltage protec tion circuit with a power sink. In communications …