Patents
Sitemap › H04 - Electric communication technique › H04Q - Selecting › H04Q 5 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
Patents for H04Q 5 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange (6,717)
09/2012
09/25/2012US8275862 RFID tag information service system
09/25/2012US8274395 Battery monitoring systems and methods
09/25/2012US8274374 Synchronization method between reader and tag
09/25/2012US8274373 Dual mode transmitter-receiver and decoder for RF transponder tags
09/25/2012US8274370 Modulator and modulation method for a wireless data transmission device
09/25/2012US8274369 Radio frequency identification device having nonvolatile ferroelectric memory
09/25/2012US8274368 Chipless microwave identification tag
09/25/2012US8274367 RFID system and RFID tag
09/25/2012US8274366 Method and apparatus for RF access to system ID and fault information
09/20/2012WO2012125046A1 Method and system for processing telephony calls
09/20/2012US20120235799 Rfid reader/writer, rfid system, and communication method
09/20/2012US20120235791 Transportation route management
09/20/2012US20120234928 Method for encoding contactless communication data from a transponder to a reader via charge modulation, in the form of a set of patterns and device for implementing same
09/19/2012CN202444584U Interconnection converter for digital media receiver (DMR) digital system and NXDN digital system
09/19/2012CN202444583U Wireless storey call system on variable-frequency construction hoist
09/19/2012CN202444582U Digital wired interphone
09/19/2012CN202444488U Digital intercommunication relay equipment
09/19/2012CN102685609A Multi-protocol soft-core digital interphone
09/19/2012CN102684734A Multifunctional two way radio shoulder microphone
09/18/2012US8269630 Methods and systems of a multiple radio frequency network node RFID tag
09/18/2012US8269611 Electronic tag reading/writing station
09/18/2012US8269610 Method for measuring pressure in a tire
09/18/2012US8269609 Devices, systems and methods for portable device location
09/18/2012US8269608 Device and method of coupling a processor to an RFID tag
09/18/2012US8269607 Proximity location system and method thereof for locating a communications device
09/18/2012US8269606 Methods and systems for RFID tag read verification
09/18/2012US8269605 RFID material tracking method and apparatus
09/18/2012US8269604 Remotely monitoring field assets
09/18/2012US8267319 Antenna, and radio frequency identifying device and method
09/12/2012CN202435612U Public mobile data network-based talkback equipment
09/12/2012CN202435544U Building intercom system using GSM mobile communication protocol
09/12/2012CN202435543U Handheld interphone
09/12/2012CN102665175A Method for realizing vehicle-mounted voice intercom by using mobile network
09/12/2012CN102665146A Intercom with camera function
09/12/2012CN102665145A Underground wireless talkback communication system based on photon switching
09/12/2012CN102665144A Communication system consisting of desk-top ground single-channel base station and walkie talkies
09/12/2012CN102664940A Multipoint medical safety calling information system
09/12/2012CN102664780A Wireless interphone monitoring system based on mobile access protocol (MAP) 27 protocol
09/12/2012CN102664651A Wireless calling and answering system with display interface
09/11/2012US8264331 Method and apparatus for detecting container movement by a crane
09/11/2012US8264330 Systems and method for communicating data in a railroad system
09/11/2012US8264329 Method and system for room activity communication
09/11/2012US8264321 System and method for enhanced RFID instrument security
09/11/2012US8264319 Location system and communication system
09/07/2012WO2012118448A1 Communication devices and methods for performing communication
09/06/2012US20120223819 Near Field Communication Event Attendee Tracking System
09/06/2012US20120223818 Data random selection device
09/06/2012US20120223811 Multiple Antenna Localizing
09/05/2012CN202424965U Multimode interphone
09/05/2012CN202424964U Wireless digital talkback microphone system
09/05/2012CN202424842U Network-based interphone system
09/05/2012CN202424793U Frequency conversion circuit for remote interphones with low power consumption, high sensitivity and low distortion
09/05/2012CN202424709U Interphone application circuit
09/04/2012US8260204 Wireless communication system using surface acoustic wave (SAW) second harmonic techniques
09/04/2012US8260201 Dispersive antenna for RFID tags
09/04/2012US8258927 Method and system for inventorying wireless transponders providing anti-eavesdropping anti-collision
09/04/2012US8258926 Method for automatically checking in passengers and their luggage
09/04/2012US8258925 Frequency synthesizer and frequency synthesizing method
09/04/2012US8258924 Merchandise-integral transaction receipt
09/04/2012US8258922 Electronic device with remote control function
08/2012
08/30/2012US20120218084 Method and apparatus for presenting printed media based on radio frequency memory tag detection
08/30/2012US20120218082 Communications system including display with nfc device associated therewith and associated methods
08/29/2012CN202406248U Digital interphone
08/29/2012CN102651919A Device for realizing communication between 350M analog cluster talkback system and POC (PTT Over Celluar) talkback system
08/28/2012US8253567 Multiple radio frequency network node RFID tag
08/28/2012US8253543 RFID tag identification information management system
08/28/2012US8253542 Method and system for performing affinity transactions
08/28/2012US8253541 Method and apparatus for varying signals transmitted by a tag
08/28/2012US8253540 Method of reading data from transponders through a reader, a transponder, and a reader
08/28/2012US8253539 Rfid reader management system and method
08/28/2012US8253538 Asset management using mobile radio-frequency identification (RFID) readers
08/28/2012US8253537 Apparatus for communicating with RFID tag and article management system
08/28/2012US8253533 Locker system and method
08/28/2012US8251284 Covers having RFID functionality for portable electronic devices
08/23/2012WO2012112843A2 System and method for tracking pipe activity on a rig
08/23/2012US20120212330 Antenna, apparatus and method for identifying and tracking multiple items
08/23/2012US20120212329 Method and apparatus to detect transponder tagged objects, for example during medical procedures
08/23/2012US20120212328 Method and apparatus to detect transponder tagged objects, for example during medical procedures
08/23/2012US20120212326 System and method for tracking pipe activity on a rig
08/23/2012US20120212325 Communication apparatus, communication system, and communication method
08/22/2012CN202395933U Digital duplex remote networking wired interphone
08/22/2012CN202395932U Wireless cluster intercom system and wireless earphone headset and receiver
08/22/2012CN202395931U Digitalized internet protocol (IP) network broadcast system
08/22/2012CN202395822U Multifunctional integrated interphone
08/22/2012CN102647652A Audio acquisition and processing circuit for vehicle-mounted talkback system
08/21/2012US8248239 Multiple radio frequency network node RFID tag
08/21/2012US8248238 Multiple radio frequency network node RFID tag
08/21/2012US8248214 Adjustable lighting for displaying products
08/21/2012US8248213 Deterministic method for efficiently querying and identifying multiple items on a communication channel
08/21/2012US8248212 Pipelining processes in a RF reader
08/21/2012US8248211 Selective RF device activation
08/21/2012US8248210 Method and system to determine the position, orientation, size, and movement of RFID tagged objects
08/21/2012US8248209 Device for communicating between a mobile element and a fixed element
08/21/2012US8248208 RFID-based active labeling system for telecommunication systems
08/21/2012US8248204 Tag detecting system, moving object detecting method, and entrance/exit management system
08/16/2012US20120206238 Antenna for protecting radio frequency communications
08/16/2012US20120206237 On-premises restaurant communication system and method
08/15/2012CN102640516A Apparatus and method using histogram-based techniques for avoiding overpolling
08/15/2012CN102638732A Building intercom system with resident cellphone used for intercommunicating with visitors and opening gate at stairs
08/15/2012CN102638287A Compact type interphone convenient to use
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