Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 8102266 | Radio intra-subject information acquiring system A transmitting and receiving apparatus (2) that transmits a radio signal to a capsule endoscope includes: a transmitting level determining unit (25) disposed near a transmitting resonance circuit (22); a frequency controller (26) that con... | 01/24/2012 |
| 7956750 | Wireless IC tag To provide a wireless IC tag which is readable even in a plurality of countries (destination countries) using different radio frequency bands for reading. The wireless IC tag of the present invention is characterized by comprising: a case (20); an ante... | 06/07/2011 |
| 7936272 | Dynamic antenna tuning circuit for a radio frequency identification reader A resonant antenna circuit for a radio frequency identification (RFID) reader generates an electrical signal for activating a passive identification tag. The identification tag in turn generates a coded electrical signal that is detected by the reader. The electrica... | 05/03/2011 |
| 7907056 | Contactless communication circuit and portable terminal The present invention provides a contactless communication circuit having both a contactless communication card function and a contactless communication reader/writer function, which includes a capacitor section that forms a parallel-resonant circuit with a contactl... | 03/15/2011 |
| 7868764 | Circuit and method for power-up optimization of RFID transponder The present invention relates to a radio-frequency identification tag (10) and a related method of operation, whereby the tag comprises an antenna (12) being adapted to draw a voltage from an externally applied RF field having a first frequency, and fu... | 01/11/2011 |
| 7843345 | Dual frequency RFID circuit A radio frequency identification (RFID) transponder (FIGS. 4 and 5A) is disclosed. The transponder includes first (RF) and second (GND) terminals. A first resonant circuit (500, 504, 508) is connected between the first and second terminals. A se... | 11/30/2010 |
| 7821401 | RFID tag containing two tuned circuits An RFID tag is disclosed adapted to be read by an interrogator including a reader antenna having a carrier frequency. The tag includes a first circuit including a first inductor and a first capacitor, wherein the first circuit is tuned to a frequency above the carri... | 10/26/2010 |
| 7817043 | Radio frequency tag The present invention provides an RF tag which does not have an integrated circuit such as a silicon chip, can retain a plurality of information, can rewrite or add the information, and is inexpensive. The RF tag includes an RF resonance circuit which has at least t... | 10/19/2010 |
| 7782210 | Resonance tag A resonance tag includes a dielectric layer, a first circuit layer, a second circuit layer and a hard pad. The first circuit layer is formed on one surface of the dielectric layer, and the first circuit layer has a first electrode pattern and a coil. A second circui... | 08/24/2010 |
| 7696883 | Resonance tag, method of reversibly changing resonance characteristics of resonance circuit, and capacitive element In a resonance tag provided with a resonance circuit composed of a capacitive element and an inductive element, the capacitive element is characterized by having a condition under which the capacitance of the capacitive element is reversibly changed by a voltage app... | 04/13/2010 |
| 7646303 | Detector A detector for detecting the presence of a memory tag, the detector comprising a radio frequency source operable to generate a radio frequency signal and a detector resonant circuit part connected to the radio frequency source, the detector resonant circuit part com... | 01/12/2010 |
| 7642915 | Multiple frequency detection system A multiple frequency detection system allows the seamless integration of an almost ideal EAS function with an RFID function. While not being limited to a particular theory, the preferred embodiments integrate EAS technology at, for example, 8.2 MHz or 14 MHz, and RF... | 01/05/2010 |
| 7595732 | Power generating circuit A power generating circuit includes a rectifying module and a tuning module. The rectifying module is operably coupled to convert a radio frequency (RF) signal into a voltage. The tuning module is operably coupled to tune the rectifying module in accordance with the... | 09/29/2009 |
| 7535362 | Circuit arrangement and method for supplying power to a transponder A circuit arrangement is provided for a power supply to a transponder including an antenna resonant circuit and a downstream rectifier circuit for receiving and for rectifying an electromagnetic signal, a charging capacitor connected downstream on the output side of... | 05/19/2009 |
| 7535363 | Miniature resonating marker assembly A miniature resonating marker assembly that includes, in one embodiment, a ferromagnetic core, a wire coil disposed around the core, and a capacitor connected to the wire coil adjacent to the magnetic core. The core, coil, and capacitor form a signal element that, w... | 05/19/2009 |
| 7528725 | Passive dynamic antenna tuning circuit for a radio frequency identification reader A resonant antenna circuit for a radio frequency identification (RFID) reader generates an electrical signal for activating a passive identification tag. The identification tag in turn generates a coded electrical signal that is detected by the reader. The electrica... | 05/05/2009 |
| 7456747 | Method and device for suppressing a transmitting signal in a receiver of an RFID write/read unit A method and apparatus is disclosed for operating an RFID read/write unit with transmitting signal suppression. The RFID read/write unit comprises a radio frequency part including a transmitter and a receiver, and a baseband part based on digital signal processing. ... | 11/25/2008 |
| 7439800 | Amplitude demodulator for an electromagnetic transponder An amplitude demodulator comprising a capacitive element for filtering a first D.C. component of a received signal, an element for detecting edges in the signal provided by the capacitive element, and at least one switching element for forcing, at least after detect... | 10/21/2008 |
| 7439860 | Auto-tuned RFID reader antenna A reader for an RFID system includes an antenna assembly, a signal driver and a controller. The antenna assembly has an antenna coupled to an antenna tuning circuit which includes a variable capacitance circuit. The signal driver is coupled to the antenna assembly t... | 10/21/2008 |
| 7439862 | Antenna array for an RFID reader compatible with transponders operating at different carrier frequencies An antenna array is provided for an RFID reader, which includes a first reader antenna tuned to operate at a first frequency and a second reader antenna tuned to operate at a second frequency different from the first frequency. The first and second antennas are pref... | 10/21/2008 |
| 7436286 | Circuit arrangement and method for increasing the functional range of a transponder A transponder receives its operating energy from an external source such as a radio signal or a battery. Such transponders are used for example in a vehicle or in a remote sensor. The response range of the transponder is increased by converting the received energy i... | 10/14/2008 |
| 7432808 | Wireless module enabled component carrier for parts inventory and tracking Apparatus, system, and method for wireless module enabled component carrier for parts inventory and tracking are described. ... | 10/07/2008 |
| 7424265 | Rectifier circuit and radio communication device A rectifier circuit includes a bias circuit that outputs a direct-current voltage; a first MOS transistor that has a gate and a source; and a second MOS transistor that has a gate, a source, and a drain connected to the source of the first MOS transistor. Only the d... | 09/09/2008 |
| 7414533 | System for placing radio frequency identification (RFID) antennas, tags and interrogators A system and method for optimally placing radio frequency identification (RFID) antennas. The system varies the placement of RFID tag and interrogator antennas with respect to each other and a stationary object or objects. A signal generator sends a known reference ... | 08/19/2008 |
| 7403122 | RFID tag circuits operable at different speeds Embodiments of RFID tag circuits and methods are described, which include a chip having a clock circuit operable to generate a clock signal having different frequencies, and one or more components operable to work at the different frequencies. In addition to a regul... | 07/22/2008 |
| 7397377 | Characterizing a cargo container Characterizing a cargo container and its contents. A system comprising an emitter to emit radio frequency (RF) energy, a receiver to receive an RF response related to the energy, and a processor operative to compare a plurality of RF responses. A method for characte... | 07/08/2008 |
| 7388498 | Method and system for producing and reading labels based on magnetic resonance techniques The invention provides a method and system for labeling items, wherein the labels contain digital information and can be read when desired. The coding of the labels is done by choosing specifically engineered nano-particles, micro-particles, or liquid material in th... | 06/17/2008 |
| 7388500 | Enhanced mechanism for radio frequency identification reader The invention relates to an enhanced mechanism for RFID reader which includes: an antenna for receiving a RFID signal transmitted from an object under test and outputting the RFID signal to the RFID reader; a metal plate disposed on an entrance of a building. The me... | 06/17/2008 |
| 7370808 | Method and system for manufacturing radio frequency identification tag antennas A method and system for manufacturing radio frequency identification (RFID) tag antennas is described. A casting surface is provided having at least one raised antenna pattern extending therefrom. The casting surface is coated at least in an area other than the at l... | 05/13/2008 |
| 7367496 | Detecting wear through use of information-transmitting devices Detecting wear through use of information-transmitting devices. At least one information-transmitting wireless device is provided for each of one or more wear positions of an item, wherein each of the devices is adapted for transmitting information to a reader, such... | 05/06/2008 |
| 7369609 | Duty factor encoded data and clock transmission A method, apparatus, article of manufacture, and a memory structure for transcieving data and a clock on a single data stream. The method comprises the steps of receiving an encoded data stream, the encoded data stream generated by encoding a data stream by a duty f... | 05/06/2008 |
| 7368033 | Security tag and system for fabricating a tag including an integrated surface processing system A method of fabricating a tag includes the steps of applying a first patterned adhesive to the surface of the substrate and applying a first electrically conductive foil to the first patterned adhesive. A portion of the first electrically conductive foil not adhered... | 05/06/2008 |
| 7366466 | Wireless communication device interconnectivity A wireless communication device that is attached or included in an electronic object, such as a portable computer, having its own separate communication system. The separate communication system has an antenna for receiving and transmitting wireless communications, ... | 04/29/2008 |
| 7360689 | Method and system for proffering multiple biometrics for use with a FOB The present invention discloses a system and methods for biometric security using multiple biometrics in a transponder-reader system. The biometric security system also includes a biometric sensor that detects biometric samples and a device for verifying biometric s... | 04/22/2008 |
| 7362210 | System and method for gate access control A system for providing stand-off biometric verification of a driver of a vehicle at a control gate while the vehicle is moving, including a pre-verification system and a post-verification systems. The pre-verification system is installed before an entrance of a faci... | 04/22/2008 |
| 7362226 | Control system, surface, and control device The present invention provides a control system including: plural wireless measuring units, each of which, when receiving a radio signal, uses the signal as an energy source to measure a physical quantity, and generates and sends a radio signal having an attribute r... | 04/22/2008 |
| 7357299 | Method and apparatus for synchronization of proximate RFID readers in a gaming environment The present invention provides a system and method for an improved player tracking in a gaming environment. Certain embodiments include a plurality of radio frequency identification (RFID) readers for detecting a response signal from an RFID tag, an RFID tag generat... | 04/15/2008 |
| 7353997 | RFID barcode and RFID barcode reading system A radio frequency identification (RFID) barcode includes a plurality of sets of conductive strips and a plurality of inductors, wherein each of the plurality of sets of conductive strips respectively includes a plurality of conductive strips separated by at least on... | 04/08/2008 |
| 7355516 | Method and apparatus for protecting culinary products A microwave-resistant and waterproof security tag for use with food products, especially meat products. The security tag includes a pair of single, open loop conductive traces in between which is disposed a similarly-shaped dielectric layer. This combination is enca... | 04/08/2008 |
| 7356394 | RFID vehicle management system and method This disclosure describes a Radio Frequency Identification (RFID) vehicle management system and method. For example, an RFID tag may be coupled with a particular vehicle and operable to store identifying information associated with the vehicle and to automatically c... | 04/08/2008 |
