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| Number | Title | Issue Date |
| 7388464 | Location system and communication A location system comprises a plurality of transponders whose locations are detectable by a base system. The base system interrogates (51-55) the transponders one at a time in accordance with a schedule of consecutive time slots. In response to a prior... | 06/17/2008 |
| 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 |
| 7302362 | System and method for efficient and collective adjustment of sensor reporting ranges for long-lived queries A system and method for providing energy-efficient support of continuous aggregate queries in a sensor network by efficiently orchestrating the collection and transmission of data gathered by a collective set of sensors to ensure conformance to a specified QoI bound... | 11/27/2007 |
| 7295252 | Control apparatus of audio-visual display apparatus and the control method A control apparatus of an audio-visual display apparatus is provided, wherein only one remote control unit in a plurality of remote control units has a control right for controlling the audio-visual display apparatus, the control apparatus determines whether a signa... | 11/13/2007 |
| 7287063 | Storage area network methods and apparatus using event notifications with data An storage area network (SAN) has a manager digital data processor that includes a first element that maintains a first representation of the SAN and a second element that maintains a second representation of the SAN. The first element generates notifications of eve... | 10/23/2007 |
| 7222111 | Multi-utility energy control and facility automation system with dashboard having a plurality of interface gateways A multi-utility energy and facility automation control system has control center computer(s) connected to utility consuming systems and software that formats energy data, stores, retrieves, diagnoses and acts in response to changes and includes a multi-utility maste... | 05/22/2007 |
| 7142107 | Wireless sensor unit A low cost, robust, wireless sensor that provides an extended period of operability without maintenance is described. The wireless sensors are configured to communicate with a base unit or repeater. When the sensor unit detects an anomalous ambient condition (e.g., ... | 11/28/2006 |
| 7093070 | Method and system for selectively recording system information A method and apparatus for recording data concerning a system is provided. The apparatus comprises a memory card, such as a COMPACTFLASH card, and a processor unit, such as a T2CAS processor unit. The memory card includes a supplemental file that contains... | 08/15/2006 |
| 7091687 | Electrical system for controlling at least one gate or door or similar element of the type moved electrically An electrical system for controlling at least one gate or door or similar element of the type moved by means of at least one corresponding electric motor includes an electric network (NTWRK) consisting of two electric wires adapted to allow the distribution of direc... | 08/15/2006 |
| 7042352 | Wireless repeater for sensor system A low cost, robust, repeater for a wireless ambient sensor system that provides an extended period of operability without maintenance is described. The repeater includes a controller and first and second transceivers. The controller is configured to control operatio... | 05/09/2006 |
| 6996414 | System and method of group calling in mobile communications Information is retrieved from a list of members of a group call group. Based on the retrieved information, a group call is established between first and second mobile stations (MS). The first MS is served by a first base station controller (BSC) and the second MS is... | 02/07/2006 |
| 6958677 | Object location monitoring system An object location monitoring system includes beacons that are spatially distributed throughout an area to be monitored. The beacons transmit interrogation signals that are received and echoed by transponders that attach to moveable objects. Each beacon retransmits ... | 10/25/2005 |
| 6931555 | Power management system including a power controller for switching components to low or high power state based on signals received from power modules A power management system for electrical and electronic apparatus has a number of components which may be switched to a low power state. A power controller (20) is coupled to each component in the apparatus and a plurality of power modules (22, 24, 26)... | 08/16/2005 |
| 6904385 | Multi-utility energy control system with internet energy platform having diverse energy-related engines A multi-utility energy control system has control center computer(s) connected to various utility consuming systems and software that formats pertinent systems' energy data, stores, retrieves, diagnoses and acts in response to changes and includes a multi-utility ma... | 06/07/2005 |
| 6901066 | Wireless control network with scheduled time slots A building monitoring system is disclosed that includes a bi-directional radio link between a master and a number of remote units, wherein the master unit schedules the transmission times of the remote units to avoid collisions. ... | 05/31/2005 |
| 6864778 | Method of preventing collision between remote control signals The invention relates to a system including an apparatus and a plurality of remote controls. Each remote control is equipped with a detector for detecting infrared signals from the other remote controls. The remote controls are capable of controlling the transmissio... | 03/08/2005 |
| 6749117 | Contactless IC card, responding method, and program therefor The contactless IC card, the responding method, and the program that control the collision of response to the minimum, wherein the response judgment unit judges whether there is an initial response of the other contactless IC card at a specific time, and the respons... | 06/15/2004 |
| 6566997 | Interference control method for RFID systems A reader unit for use in a radio frequency identification (RFID) system delays the initiation of an interrogation operation when potentially interfering radio frequency (RF) energy is detected within an operational frequency range of the system. The reade... | 05/20/2003 |
| 6346873 | Power saving in a contention and polling system communication system A parent node transmits a third specific message to child nodes as a broadcast message if a first specific message indicating the start of the child node collides with another message so that normal receiving cannot be performed. Then, the parent node seq... | 02/12/2002 |
| 6134692 | Information identification system for identifying response units by a control unit, and the control unit and the response units for the information identification system A control unit transmits address area designation information designating an arbitrary bit position in ID data. At least a response unit transmits a response signal with an error detection code attached to predetermined information in the unique informati... | 10/17/2000 |
| 5900824 | Method for transferring data detected by a plurality of sensors To improve the flexibility in changing a transfer procedure and the efficiency in transferring data when a plurality of sensors transmit detected data to a detected data receiver. The detected data receiver transmits detected data transfer request command... | 05/04/1999 |
| 5748098 | Event correlation Simultaneous events reported to an equipment management system are compared with historical data in order to establish whether there is a relationship between the events. Historical data is used to determined the statistical probability of the events occu... | 05/05/1998 |
| 5726644 | Lighting control system with packet hopping communication Building lights are master controlled to reduce power consumption under building master control, or in response to electric utility commands to the building computer. Each lighting wall control unit includes a transceiver which can communicate to at least... | 03/10/1998 |
| 5570364 | Control for multimedia communication on local access table In a communication system, a network has nodes each connected in a star relationship to a number of end units that include a device for assuming one of an idle, active, or on-line state and for requesting the node to which it is connected to change it fro... | 10/29/1996 |
| 5544166 | Electrical circuit arrangement having at least two local transmitting units for receiving and coding local measuring signals and for transmitting the coded measuring signals to a central unit The present invention relates to an electrical circuit arrangement having at least two local transmitting units (2) for receiving and coding local measuring signals and for transmitting the coded measuring signals to a central unit (1), which local transm... | 08/06/1996 |
| 5469436 | Polling-type digital communications system having pseudo-balanced mode A large communications network is linked to a primary terminal and a secondary terminal. The primary polls the secondary whenever it has data to send, and need not poll at any maximum fixed interval. The poll operation sends a sequence of data frames to t... | 11/21/1995 |
| 5422626 | Electrical monitoring system A system for monitoring a location for the occurrence of a predetermined condition thereat includes a transmitter located at the monitored location for normally transmitting a series of first electrical signals at a first repetition rate and in a first ti... | 06/06/1995 |
| 5155480 | Event reporting using a two-wire non-blocking bus structure An apparatus for non-blocking event reporting from event reporting units to a monitoring circuit includes a first and second common wire coupling the units to the monitoring circuit. A constant level signal is generated on the first wire and a pulse signa... | 10/13/1992 |
| 5089974 | Building technical management controller with a two-wire data and power transmission line A building power management controller comprises a plurality of modules connected by a two-wire network. Each module comprises a data transceiver device, controlled by a microprocessor to both transmit data to the other modules and to a central unit via t... | 02/18/1992 |
| 5012510 | Dynamic callback technique A dynamic global callback technique which is capable of maintaining a manageable number of incoming calls to a central location from a plurality of remote units. A plurality of remote units are prompted to initiate callback attempts to a central location ... | 04/30/1991 |
| 4972507 | Radio data protocol communications system and method A method and system of radio data communications especially useful in communicating over a special communications channel between a base station or cell site of a cellular telephone system and one of many user stations. Each user station communicates an a... | 11/20/1990 |
| 4958381 | Two way communication system An information transmitting system capable of two way communication, suitable for use in transmitting information signals between a central control unit and a plurality of terminal apparatus units. Each terminal apparatus unit may be located at a differen... | 09/18/1990 |
| 4677613 | Network system for connecting multiple I/O devices to computers A method of allocating transmission time for a plurality of I/O devices (14) connected to a transmission line (12) comprising the steps of causing each device to listen constantly to determine if the line is being used and to only initiate a transmission ... | 06/30/1987 |
| 4602252 | Method and device for data communication A method for data communication usable for a system having a common transmission line, a plurality of transceivers connected to the common transmission line, and a data processing equipment connected to each of the transceivers, the system being arranged ... | 07/22/1986 |
| 4477809 | Method for random-access radio-frequency data communications A method for random-access data communications to and from a central controller, from and to at least one of a plurality of remote stations, by providing at least one radio-frequency channel having the bandwidth thereof allocated into at least a message c... | 10/16/1984 |
| 4162483 | Bilateral master station-plural satellite station signalling apparatus A bilateral digital signalling network couples a master station and plural remote, or satellite stations via a common communications link--as by way of an MATV coaxial cable. Any data/control signals may be interchanged by the system stations--for example... | 07/24/1979 |
