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| Number | Title | Issue Date |
| 5502818 | Procedure for the determination of message identification in the data transmission network of an elevator system A procedure is disclosed for determining the message identifiers in a control area network CAN data transmission network of an elevator system where message identifiers are used in the transmission of messages. Each node in the network monitors the data t... | 03/26/1996 |
| 5493692 | Selective delivery of electronic messages in a multiple computer system based on context and environment of a user The present invention describes a method for selectively delivering electronic messages to an identified user or users in a system of mobile and fixed devices, including multiple display devices and multiple users, based on the context of the system and t... | 02/20/1996 |
| 5493650 | Apparatus and method for monitoring the presence of cables connected to ports of a computer network controller and automatically reconfiguring the network when cables are connected to or removed from the controller An apparatus for monitoring whether a cable is coupled to a port of a computer network. A free-running oscillator is initially set to a base frequency when a cable is not coupled to the port. If a cable is subsequently coupled to that port, the inherent c... | 02/20/1996 |
| 5481720 | Flexible interface to authentication services in a distributed data processing environment In a distributed data processing system, the authentication of a process at one node for the use of a service at another node is performed in a facility that is separate from the requestor and service process. The separate facility is also replaceable, th... | 01/02/1996 |
| 5467295 | Bus arbitration with master unit controlling bus and locking a slave unit that can relinquish bus for other masters while maintaining lock on slave unit A computer bus that enables bus mastering agents to send/receive a burst of data to/from a slave agent without determining in advance the number of data words to be transferred, or even the maximum number of data words that could be transferred. Either th... | 11/14/1995 |
| 5463741 | Duplicated logic and interconnection system for arbitration among multiple information processors An information processing network includes multiple processing devices, a main storage memory, and an interface coupling the processing devices to the main storage memory. All processing devices contend for control of the interface on an equal basis, subj... | 10/31/1995 |
| 5450584 | Apparatus and method for automatic transfer of data base information in response to load distribution among interconnected terminal stations A distributed data-base communication network system includes a plurality of terminal stations which respectively contain data-base devices and which are associated with one another by means of data communication lines. A data-base management apparatus is... | 09/12/1995 |
| 5450594 | Enhanced collision detection for ethernet network Enhanced collision detection in an Ethernet network, particularly useful for passive nodes using receive mode collision detection. When a transmitting node detects a collision, for example, using transmit mode collision detection, it activates a current s... | 09/12/1995 |
| 5448701 | Flow controller for shared bus used by plural resources The flow controller utilizes intelligent adapters to connect plural resources to a bus and a central arbiter that decides which adapters have access to the bus for the next bus cycle. Each adapter has an input buffer for transmitting data onto the bus, an... | 09/05/1995 |
| 5440698 | Arbitration of packet switched busses, including busses for shared memory multiprocessors An arbiter is provided for resolving contention on synchronous packet switched busses, including busses composed of a plurality of pipelined segments, to ensure that all devices serviced by such a bus are given fair, bounded time access to the bus and to ... | 08/08/1995 |
| 5434797 | Audio communication system for a computer network A two-way audio communication system is designed to allow basic audio communication between two users on a common computer network. The audio communication system of the present invention is designed to work in the background of the computer, so the user ... | 07/18/1995 |
| 5430843 | Data transmission system and method for transmitting data having real-time and non-real-time characteristics A system for transmitting data between a plurality of linked stations within a cycle period defined by successive transmissions of a header signal indicating the start of a data transmission, only one station having a right to transmit data at a given tim... | 07/04/1995 |
| 5408419 | Cellular radiotelephone system signalling protocol A communications protocol for a cellular network comprised of a plurality of exchanges each of which includes a software package for providing services to a plurality of subscribers. According to this protocol, efficient communication between two exchange... | 04/18/1995 |
| 5392401 | Switching system for simultaneously transferring data between data processing units The system performs an optimized number of simultaneous transfers of data packets between pairs of units comprising an origin unit and a target unit selected among N data processing units (8). Each data processing unit comprises a set of outbound queues w... | 02/21/1995 |
| 5390351 | System for communicating with plural nodes in predetermined intervals depended on integers assigned and changed based upon configuration thereof A cost-effective motion control system communication architecture is provided that supports a centralized control node, distributed control nodes, and smart I/O peripheral control nodes. Networks designed using this architecture, which employs a serial bu... | 02/14/1995 |
| 5280582 | No-owner frame and multiple token removal mechanism for token ring networks A ring purging station for a token-ring network is disclosed. The station performs purging operations to remove no-owner frames and frame remnants from the network. The station begins a purging operation by detecting the token on the network and removing ... | 01/18/1994 |
| 5249269 | Communication network system using a fuzzy control process A communication network system comprising a communication line network, a plurality of terminals connected to the communication line network, and a fuzzy control unit for allocating a right to access the communication network according to a fuzzy deductio... | 09/28/1993 |
| 5237695 | Bus contention resolution method for network devices on a computer network having network segments connected by an interconnection medium over an extended distance A method is used to perform arbitration between network devices connected to one of a first network segment and a second network segment, where the first network segment is connected to the second network segment by a long interconnection medium over an e... | 08/17/1993 |
| 5228127 | Clustered multiprocessor system with global controller connected to each cluster memory control unit for directing order from processor to different cluster processors An apparatus and method for controlling clusters having processors constituting a multiprocessor system. The apparatus includes a global control unit for processing orders between clusters and a memory control unit, provided in each cluster, for controlli... | 07/13/1993 |
| 5191649 | Multiprocessor computer system with data bus and ordered and out-of-order split data transactions A method of transferring data in response to a read command in a computer system having a plurality of processors coupled to an address bus, a command bus and a data bus is described. A first processor generates and sends the read command to read a first ... | 03/02/1993 |
| 5191652 | Method and apparatus for exploiting communications bandwidth as for providing shared memory A multiprocessor system linked by a fiber optic ring network uses some of the bandwith of the ring network as a shared memory resource. Data slots are defined on the network which can carry message packets from one processor to another or network memory p... | 03/02/1993 |
| 5165032 | Process and device for hierarchized access to a network for transmission of information A device for hierarchized access to a network for transmission of information by response in a communication frame, from stations connected to this network, including a counter (62) of bits transmitted on the network, connected to an input of a comparison... | 11/17/1992 |
| 5142623 | High performance memory imaging network for a real time process control system A data communications arrangement for a distributed processor control system having a number of stations which can send and receive control data, includes a communications processor at each station effective for controlling the flow of control data over a... | 08/25/1992 |
| 5136716 | Session control in network for digital data processing system which supports multiple transfer protocols A distributed digital data processing system includes a plurality of nodes which communicate over a network. A node maintains one or more objects, each of which may be a file, that is, an addressable unit in the system, such as a program, database, text f... | 08/04/1992 |
| 5016159 | Stellate store and broadcast network with collision avoidance A stellate store and broadcast network with collision avoidance comprising a plurality of terminal devices, a central station for collectively relaying data packets issuing from the terminal devices and broadcasting them to the relevant terminal devices, ... | 05/14/1991 |
| 4992926 | Peer-to-peer register exchange controller for industrial programmable controllers A communication network for programmable logic controllers (PLC) wherein selected memory means of each PLC has at least two ports directly accessible by other PLC and certain registers of the PLC are identical. Each PLC further has an interblock gap timer... | 02/12/1991 |
| 4919545 | Distributed security procedure for intelligent networks A security technique for use in an intelligent network. The security technique provides a method for authorizing access by a process located in an invocation node to an object, or a network resource, located in an execution node. The method includes the s... | 04/24/1990 |
| 4835673 | Method and apparatus for sharing resources among multiple processing systems Multiple processing systems each inclue an administrator processor and a plurality of intelligent resources (like a printer, encoder, for example) which are coupled to the associated administrator processor via a local area network (LAN). Each administrat... | 05/30/1989 |
| 4814984 | Computer network system with contention mode for selecting master A computer network is described, consisting of a number of computers connected by a bus. Each computer in turn becomes master, and can send messages to the other computers. When it is finished its turn as master, it passes control on to the next computer ... | 03/21/1989 |
| 4800488 | Method of propagating resource information in a computer network A method of propagating resource information among computers of a computer network in a fully distributed (or decentralized) fashion. A solicit message from a client one of the computers is transmitted to one or more prescribed server ones of the computer... | 01/24/1989 |
| 4791562 | Data processing system in which modules logically "OR" number sequences onto control lines to obtain the use of a time shared bus A data processing system includes a plurality of data processing modules coupled to a bus and to a set of control lines. These modules request the use of the bus by sending respective sequences of at least two binary numbers during successive cycles on th... | 12/13/1988 |
| 4768150 | Application program interface to networking functions A system for, and method of, providing an interface to an application program for accessing networking functions. The application program interface translates routines requesting networking functions to the operating system commands which contain faciliti... | 08/30/1988 |
| 4766530 | Token passing scheme for a predetermined configuration local area network A system having a predetermined number of stations or nodes which all receive the broadcast messages. Each message includes a token value used by each node to access a token ring list. The entry accessed in the list determines whether the node has the tok... | 08/23/1988 |
| 4730250 | Local area network processing system A data processing system in which a host processor is connected to a plurality of remote processing devices over a common communication channel in which a number of the remote processors are commonly connected to a transceiver for transmitting and receivi... | 03/08/1988 |
| 4698757 | Terminal procedure for utilizing host processor log on and log off prompts An application program automatically logs on and logs off user networks by using an internal table of prompts and responses which was constructed when the user logged onto a user-specified network and responded in the usual way to prompts sent by the host... | 10/06/1987 |
| 4672572 | Protector system for computer access and use A protector device as described for enhancing the security of a computer system which includes one or more user terminals in one or more host computers. The protector device includes a detection means for monitoring communications between the terminals an... | 06/09/1987 |
| 4661902 | Local area network with carrier sense collision avoidance A local area network is disclosed including apparatus and methods for transferring data between a plurality of data processing resources ("agents") coupled to a cable. In the preferred embodiment, a plurality of agents are coupled to a common cable for da... | 04/28/1987 |
| 4658353 | System control network for multiple processor modules A system for controlling communication in a network of digital modules where each digital module has a maintenance processor which connects the digital module through a network bus to every other digital module's maintenance processor. Each transmitting m... | 04/14/1987 |
| 4513370 | Data transfer control system and method for a plurality of linked stations System and method for controlling the transfer of data between a plurality of processors in a network. Synchronization between the processors is effected by means of asynchronously operated address counters which control the transmission of data from the ... | 04/23/1985 |
| 4509117 | Communications network access rights arbitration Transferring mastership in a multi-master communications channel of a system having a plurality of intercommunicating stations is accomplished by a method which includes the grouping into a logical loop of high traffic stations those stations which must b... | 04/02/1985 |
