Patents
Patents for H04Q 5 - Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange (6,717)
01/2013
01/01/2013US8344855 Radio frequency identification interrogator and method of operating the same
01/01/2013US8344854 Transient routing slips and inter-office envelopes
01/01/2013US8344853 Secure RFID system and method
12/2012
12/27/2012US20120327111 Identifying and visualizing attributes of items based on attribute-based rfid tag proximity
12/27/2012US20120326847 Secure tag management method and system
12/27/2012US20120326845 Vehicle activity module
12/27/2012US20120326843 Device control apparatus and device control method
12/26/2012CN202634633U Industrial digital intercom alarm connection device
12/26/2012CN202634632U Hand-held terminal of satellite communication and navigation intercom in Chinese area
12/26/2012CN202634631U Audio and video emergency device
12/26/2012CN202634630U Mining intrinsically safe intercom
12/26/2012CN202634629U Face identification building intercommunication system with call forwarding function
12/26/2012CN202634417U Interphone structure capable of eliminating sound crosstalk
12/26/2012CN101998177B Rainproof doorway machine
12/26/2012CN101453625B Visible building intercom system and host thereof
12/25/2012US8340809 Intelligent shelving system and dividing element
12/25/2012US8339266 System and method for determining RFID tag placement
12/25/2012US8339245 Semiconductor device and IC label, IC tag, and IC card provided with the semiconductor device
12/25/2012US8339244 Asset tag power optimization
12/25/2012US8339243 System and method for positioning active RFID tag
12/20/2012WO2012174068A1 Background object sensor
12/19/2012CN202617300U Pluggable telephone card using proprietary definition
12/19/2012CN202617274U Wireless visual intercom system of elevator
12/19/2012CN202617180U Mobile phone with intercommunication function
12/18/2012US8335006 Document management system
12/18/2012US8334757 Controlling data access to and from an RFID device
12/18/2012US8334756 RFID device
12/18/2012US8334754 Tag communication device and tag communication method
12/18/2012US8334753 Method and system for identifying and handling (tracing/locating/identifying to receive services) an owner and items in a secure/private area
12/18/2012US8334752 Wireless tag, wireless tag communication system, wireless tag access device, method of detecting corresponding wireless tags and computer readable medium
12/13/2012US20120313759 Tracking system for persons and/or objects
12/12/2012CN202602712U Remote patient monitoring system based on Zigbee network
12/12/2012CN202602638U Underground wireless communication system
12/12/2012CN202602627U Interphone
12/11/2012USRE43848 Communication method and apparatus improvements
12/11/2012US8331931 System and method for cordless handset registration
12/11/2012US8330602 Roll of tape with RFID tag, tag tape, and cartridge for including at least a RFID tag
12/11/2012US8330581 IC tag, method of controlling the IC tag, and IC tag system
12/11/2012US8330579 Radio-frequency auto-identification system for dialysis systems
12/11/2012US8330578 Transponder device and method for providing a supply voltage
12/06/2012WO2012166159A1 Implementation of on-off passive wireless surface acoustic wave sensor using coding and switching tecniques
12/06/2012US20120306629 Device and method for checking the integrity of physical objects
12/06/2012US20120306626 Article Storage Equipment and Method of Operating Same
12/06/2012US20120306622 Proximity session mobility
12/05/2012CN202587292U Multifunctional interphone
12/05/2012CN202587291U Building talkback indoor device having chord music ringtone playing function
12/05/2012CN202587290U Dual-frequency band interphone
12/05/2012CN202587289U Two-key direct pressing host machine and building talk-back system
12/05/2012CN202587288U Building intercom device
12/05/2012CN202587287U Narrow-band integrated services digital network (N-ISDN) secondary confirmation extension set
12/05/2012CN202587286U Digital interphone for intelligent flat-falling detecting and monitoring system
12/05/2012CN202587285U Coal mine deep shaft well interphone auxiliary control device
12/05/2012CN202587208U Visual building intercom system multi-doorphone controller
12/05/2012CN202586958U Frequency modulation handheld station provided with automatic power control
12/05/2012CN202586957U Wireless frequency modulation handheld station
12/04/2012US8325041 Firearm visibility network
12/04/2012US8325020 Unique identification of devices using color detection
12/04/2012US8325019 Motion tracking techniques for RFID tags
12/04/2012US8325018 Method and apparatus to reduce data lost on personal mobile devices
12/04/2012US8325017 Time slot allocation apparatus and method for preventing collisions between time slots in TDMA-based RFID network
12/04/2012US8325016 Radio frequency identification transponder
12/04/2012US8325015 Conductive silicone wristband for wireless communications
12/04/2012US8325014 RFID readers mitigating colored noise
12/04/2012US8325013 RFID storage systems
12/04/2012US8325012 Method for optimizing RFID deployment and RFID deployment optimizer of use thereof
12/04/2012US8325011 Multiple radio frequency network node RFID tag
11/2012
11/29/2012US20120299707 User communication device based card presence monitoring and account status control
11/29/2012US20120299706 Multi-antenna signaling scheme for low-powered or passive radio communications
11/28/2012CN202565426U Interphone channel remote control changing device
11/28/2012CN202565265U Medical calling system
11/28/2012CN202558397U Build-in auxiliary engine circuit of intercom system of elevator
11/28/2012CN102802092A Interphone capable of being positioned by satellite and realizing mutual tracking of tracks
11/28/2012CN102802091A Methods, system and equipment for transmitting and processing broadcast information
11/27/2012US8320570 Apparatus and method for generating secret key
11/27/2012US8319646 Method and apparatus for tracking and monitoring containers
11/27/2012US8319636 Method for locating items
11/27/2012US8319612 Transponder detector for an RFID system generating a progression of detection signals
11/27/2012US8319611 Radio frequency indentification tag
11/27/2012US8319610 Radio-frequency identification (RFID) antenna, tags and communications systems using the same
11/27/2012US8319609 Radio frequency identification transponder
11/22/2012WO2012156988A2 Low power analog fm transceiver for bio-telemetry applications
11/21/2012CN202551265U Talkback main unit for elevator
11/21/2012CN202551264U Dual-band vehicle-mounted interphone with two operating systems
11/21/2012CN202551263U Vehicle-mounted walkie talkie with separated operation panel and host
11/21/2012CN202551054U Vehicle-mounted interphone with receiving frequency band of frequency modulation receiver
11/21/2012CN202551026U Vehicle-mounted intercom capable of simultaneously receiving two frequency bands
11/21/2012CN202551025U Encoding hand microphone device with loudspeaker
11/21/2012CN202548936U Panel-changeable talkback outdoor unit
11/21/2012CN102790926A Voice transmission method and system
11/21/2012CN102790641A Method, system and device for transmitting data
11/21/2012CN101662318B Method for controlling power in talkback communication between mobile terminals
11/20/2012US8314687 Multi-protocol RFID system using bit-lock or step-lock synchronization
11/20/2012US8314686 Radio controlled safety stop system for forklift trucks with RFID
11/20/2012US8314685 Data detector for UHF RFID tags
11/15/2012WO2012154345A1 Hierarchical fast collection procedure
11/15/2012US20120286937 Visual RFID Tags and Interactive Visual RFID Networks
11/15/2012US20120286934 Wireless sensor reader
11/14/2012CN202535489U Novel disaster prevention alarm device
11/14/2012CN202535488U Remote linkage intelligent building intercommunication system
11/14/2012CN202535351U Recording interphone
1 ... 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 ... 68