Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8183981 | Passive tag with oscillator circuit and frequency identification system utilizing the same A passive tag receiving a reader signal provided by a reader is disclosed. The passive tag includes an antenna, an oscillator circuit, and an internal chip. The antenna receives the reader signal. The reader signal is within an operation frequency band. The oscillat... | 05/22/2012 |
| 8179231 | Transmission delay based RFID tag A chipless RFID tag system having a transmitter sending an input signal and a tag substrate. The tag substrate has at least one microstrip and the microstrip has a first portion with a first impedance and a second portion with a second impedance different from the f... | 05/15/2012 |
| RE43355 | Multi-frequency identification device The present invention comprises a radio frequency identification device that utilizes multiple operating frequencies. In one embodiment of the present invention, one frequency (e.g., an ultra-high frequency such as 915 MHz, 800 MHz, 915 MHz, or microwave frequency s... | 05/08/2012 |
| 8174364 | Automatic means to trigger RFID transmitters An RFID reader requires significant power supply current, upwards or beyond 0.5 amps. Much of this power is expended to activate the reader's radio frequency transmitter. For example, the reader's transmitter may constantly be active awaiting a RFID tag entering wit... | 05/08/2012 |
| 8174362 | Methods and apparatuses to secure data transmission in RFID systems Methods and apparatuses to secure data transmission in a radio frequency identification (RFID) system against eavesdropping, using multiple communication channels. In one embodiment, a method includes communicating key information and cipher text generated based on ... | 05/08/2012 |
| 8174361 | Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator Aspects of a communication system include phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One example provides a phase shifter that include a first power divider configured to receive a signal a... | 05/08/2012 |
| 8174360 | Communication apparatus for setting up a data connection between intelligent devices The invention relates to a communication apparatus for automatically setting up a data connection between two intelligent devices (10, 20, 30). The apparatus comprises a coil (13, 23, 33) for carrying out a contactless data exchange which is part of a ... | 05/08/2012 |
| 8174363 | Multi-transceiver RFID reader system with centralized control and frequency source Embodiments of the present invention provide RFID systems having a centralized frequency source and controller. The centralized frequency source generates a reference signal, having a frequency below the RF band of interest, which is transmitted to a plurality of re... | 05/08/2012 |
| 8169301 | RFID tag information communicating apparatus This disclosure discloses an RFID tag information communicating apparatus, comprising an apparatus antenna device; a command transmission portion that generates and transmits a command signal for reading information from an RFID circuit element; an information acqui... | 05/01/2012 |
| 8164422 | Radio-frequency tag communication device, and radio-frequency tag communication system Radio-frequency tag communication system and radio-frequency tag communication device, which permit highly efficient coordinated operations of the communication devices while preventing overlapping of communication. The communication system includes a positional-rel... | 04/24/2012 |
| 8164424 | System and method of integrated processing of electronic tag A system of electronic tag has developed for integrated processing by utilizing RFID technology, which comprises a reader for collecting information, processor for processing success failure, unsure state of instruction, and a terminal for submitting transaction and... | 04/24/2012 |
| 8164423 | MOS electronic article surveillance, RF and/or RF identification tag/device, and methods for making and using the same A RF MOS- or nonlinear device-based surveillance and/or identification tag, and methods for its manufacture and use. The tag generally includes (a) an inductor, (b) a first capacitor plate coupled to the inductor, (c) a dielectric film on the first capacitor plate, ... | 04/24/2012 |
| 8159330 | System and method for dimensional rating using RFID technology A device for determining the dimensions of a parcel includes a platform and two adjacent walls. Each of the platform and walls are provided with a respective antenna for transmitting and receiving RF energy. The parcel to be measured is placed on the platform and re... | 04/17/2012 |
| RE43313 | Wireless communication systems and methods The present invention includes wireless communication systems, interfacing devices, communication methods, methods of interfacing with an interrogator, and methods of operating an interrogator. According to one embodiment, a wireless communication system includes a ... | 04/17/2012 |
| 8159329 | Location determination and guidance using radio frequency identification A method and system for location determination and guidance using radio frequency identification (RFID) are disclosed. A location of a mobile RFID reader can be determined by detecting stationary RFID tags located at fixed locations. Each RFID tag stores location in... | 04/17/2012 |
| 8154386 | RFID reader and RFID system Provided are an RF reader and an RF system. The RF reader includes: a plurality of antennas; a path selector for selecting a transmit or receive path of an RF signal; an RF processor for processing the RF signal received through the transmit or receive path of the p... | 04/10/2012 |
| 8154389 | Wireless sensor reader A wireless sensor reader is provided to interface with a wireless sensor. The wireless sensor reader transmits an excitation pulse to cause the wireless sensor to generate a ring signal. The wireless sensor reader receives and amplifies the ring signal and sends the... | 04/10/2012 |
| 8154385 | Local processing of received RFID tag responses Radio frequency identification (RFID) tags selected for inventorying using combination of preselect and/or post select criteria. The selection commands can be for selecting according to a tag memory content, by invoking the mask address or by comparing other tag cha... | 04/10/2012 |
| 8149091 | Radio-frequency tag communication device, radio-frequency tag communication system, and radio-frequency tag detecting system A radio-frequency tag communication device permitting a radio-frequency tag communication system to have a sufficiently large area of communication, with a minimum required number of interrogators. The radio-frequency tag communication device includes a transmission... | 04/03/2012 |
| 8149092 | Device and method for managing equipment maintenance The subject of the invention is a device for managing equipment maintenance. It relates to a device for managing maintenance of a number N of items of equipment EQi built into a system, i designating an index identifying the item of equipment EQi and lying between 1... | 04/03/2012 |
| 8149093 | System and method for wireless communications A method of detecting position of a moving RFID tag relative to an antenna, includes continually receiving a signal from the RFID tag at the antenna. The phase of the received signal over a time period is detected and, based on a maximum detected phase, the position... | 04/03/2012 |
| 8143995 | Control of data exchange A control device, method and system for controlling data exchange between entities and item identification devices associated with said control device; said entities having an associated data exchange means for exchanging data with item identification devices; said ... | 03/27/2012 |
| 8138889 | Method, transponder, and system for secure data exchange A method for data exchange is provided, whereby a first code is generated by a transponder, which is transmitted to a base station, a first transmission information is generated by the base station by encoding a base station code with a first identification and the ... | 03/20/2012 |
| 8138891 | RFID network control and redundancy In accordance with the preferred embodiment and alternative embodiments of the invention, RFID network control devices (RNCDs) are provided wherein RFID traffic signals from any one of multiple RFID readers may be routed to any of the RFID antennas coupled to the RN... | 03/20/2012 |
| 8138890 | Hybrid ultrasonic and radio frequency identification system and method A radio frequency identification system and method includes a tag reader and radio frequency identification tag. The tag reader includes an ultrasonic transducer capable of transmitting tones at selected ultrasonic frequencies and a radio transmitter capable of tran... | 03/20/2012 |
| 8134451 | RFID tag chips and tags capable of backscattering more codes and methods RFID tags and chips for RFID tags store a first code and a second code in memory. They are capable of backscattering a combination made from at least portions of the first code and the second code, without receiving any commands in the interim. In a number of embodi... | 03/13/2012 |
| 8120464 | RFID reader and method for removing a transmission carrier leakage signal A radio frequency identification (RFID) reader is provided, having a transmitting circuit that generates a transmitted signal to operate an RFID tag, a receiving circuit that receives a received signal including a tag signal from the RFID tag and a transmission carr... | 02/21/2012 |
| 8120461 | Automatic data collection device, method and article A radio frequency identification system comprises a radio-frequency identification substrate and an interrogator. In one embodiment, the radio-frequency identification substrate comprises a plurality of radio-frequency identification devices. In one embodiment, a fi... | 02/21/2012 |
| 8120465 | RFID tag, interrogator and system with improved symbol encoding and decoding An improved RFID Tag, Interrogator, and system wherein at least one tag modulates a radio frequency signal by modulated backscatter operations. ... | 02/21/2012 |
| 8120462 | Method and system for standing wave detection for radio frequency identification marker readers A method and system for determining the absence and presence of items in an RFID interrogation zone. At least one RFID reader transmits interrogation signals in an interrogation zone. Each RFID reader transmits interrogation signals having a forward amount of RF ene... | 02/21/2012 |
| 8120463 | RFID protocol for improved tag-reader communications integrity The present invention provides a means by which the reliability of communication between any RFID reader and tag in an RFID system is improved by using an “interleaved parity” algorithm. The improved reliability is obtained by computing, on one RFID device, an i... | 02/21/2012 |
| 8120467 | Mobile portal for RFID applications A mobile portal for RFID applications includes an RFID reader for reading identifications of proximately located RFID tagged items in the environment. A communicator is coupled to the RFID reader to receive the read identifications and then communicate the received ... | 02/21/2012 |
| 8120466 | Decoding scheme for RFID reader The present invention is directed toward the recovery of RFID signals from RFID credentials. The recovery and subsequent interpretation of RFID signals may be accomplished by providing a set of predetermined probabilities for the occurrence of a symbol after another... | 02/21/2012 |
| 8120468 | Security system for inventory A security system for inventory automatically detects removal of inventory items from an area or areas protected with security sensors. A person removing the item then scans an identifying code of the item, such as its bar code or radio-frequency identification (“... | 02/21/2012 |
| 8115597 | RFID tags with synchronous power rectifier The present disclosure provides a power rectifier for a Radio Frequency Identification tag circuit. The rectifier is constructed from a pair of complementary MOS transistors. Gates of the transistors have predetermined voltages applied to them. The applied voltages ... | 02/14/2012 |
| 8115594 | Tag communication device, tag moving direction detecting system and tag moving direction detecting method The invention provides a tag communication device, a tag moving direction detecting system and a tag moving direction detecting method able to detect the moving direction of a moving body attaching a RFID tag thereto by simple processing, and able to easily detect t... | 02/14/2012 |
| 8115595 | Reader control system An RFID reader control system and method is provided. A protocol for controlling an RFID reader and an RFID reader control unit of a mobile phone is defined. Messages, information, commands, responses, and notification are constructed and transmitted between the RFI... | 02/14/2012 |
| 8115596 | Method and system for controlling distant equipment A method and system for controlling distant equipment. A passive radio frequency identification (RFID) tag within a Programmable Secure Remote Controller (PSRC) receives a radio frequency (RF) signal from a transmitter integrated in the distant equipment. The distan... | 02/14/2012 |
| 8115598 | Near field communication front-end A near field communication front-end includes an up conversion module, a plurality of coils, and a down conversion module. The up conversion module is coupled to convert an outbound symbol stream into a plurality of outbound signals based on a frequency-space encodi... | 02/14/2012 |
| 8115599 | Methods and systems for locating and identifying labware radio-frequency identification tags Methods and systems for automatically locating and identifying labware using radio-frequency identification (RFID) tags are described herein. The methods and systems include a plurality of RFID tags (pre-programmed with unique data codes) that are associated with la... | 02/14/2012 |
