Famous Patents
The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6470183 | Apparatus and method for reducing the effects of intermodulation interference in a cellular radio system A system and method are presented for reducing intermodulation products in a cellular radio system. The cellular radio system constructs and stores modified channel sets that have a reduced measure of homogeneity. The cellular radio system selects a chann... | 10/22/2002 |
| 6381328 | ETSI intelligent network capability set 1 intelligent network application protocol service switching point finite state machine A finite state machine that implements the ETSI Intelligent Network Capability Set 1 for INAP protocol using a first finite state machine connected to a second finite state machine. To accomplish this implementation, the first finite state machine receive... | 04/30/2002 |
| 6144659 | Telecommunication equipment support of high speed data services A line interface unit terminates individual subscriber lines and supports conventional telephone service and high speed data service. It provides an interface between subscriber customer premises equipment and central office equipment. The use of large di... | 11/07/2000 |
| 5956394 | Common treatment of calls from subscribers served by different types of telecommunication equipment A telecommunication network includes the first subscriber served by one type of telecommunication switch and a second subscriber served by a different type of telecommunication switch. A group affiliation parameter which defines an organization of which t... | 09/21/1999 |
| 5893115 | Isochronal updating of data records Records stored in a database are reset on an as-accessed basis. A record in the database to receive new data is identified when new data arrives to be incorporated with existing data in a given field. A next reset date stored in the record is read and com... | 04/06/1999 |
| 5838698 | Alignment of parity bits to eliminate errors in switching from an active to a standby processing circuit Glitchless switching between active and standby telecommunication apparatus having hierarchical nested parity bits is provided. A higher order parity bit is calculated based on defined data as well as a lower order parity bit. A method is provided for ali... | 11/17/1998 |
| 5835779 | Message transmission among processing units using interrupt control technique The transmission of messages among multiple processors is controlled by the use of token and message interrupts. A token interrupt must be received from the processor sought to perform message processing. Failure to receive such a token interrupt prohibit... | 11/10/1998 |
| 5815563 | Telecommunication system with remote call pick-up capabilities Remote call pick-up is provided for analog telephones. Upon receiving a call request for a first analog CPE, a first record associated with the first CPE is read. The record contains a directory number for a second analog CPE. The first CPE is rung with a... | 09/29/1998 |
| 5765125 | Detection of tones while minimizing incorrect identification of other sounds as tones A first validation circuit utilizes residual energy unaccounted for by a linear predictive coding model for a specified order of model as a criteria on which to make a validity determination of whether a valid tone or digit has been received. A second val... | 06/09/1998 |
| 5751800 | Screening of incoming telephone calls prior to call completion to the destination party A destination telecommunication switch receives a request to establish a call to a first party served by the switch. The request includes call type data that identifies the party originating the call request as one of a plurality of call categories. A fir... | 05/12/1998 |
| 5673311 | Hierarchical switch support of services for subscribers directly served by local exchange carriers A telecommunication network includes a first local exchange carrier (LEC) switch that provides service to first subscribers. A first signal from the first switch is received at a second telecommunication switch disposed at a hierarchical level above the f... | 09/30/1997 |
| 5673312 | Control of call features provided to a subscriber by a hierarchical telecommunication switch A telecommunication network supports subscribers and recognizes a request for call origination by a calling party on an associated communication line. A first record in a database is located based on the identification of the calling party's line. A first... | 09/30/1997 |
| 5673310 | Hierarchical switch support of services for subscribers of separate centrex exchanges A telecommunication network serves first subscribers by a first Centrex telephone exchange (CTX) via a first telecommunication switch. A first signal is received at the first switch from the first CTX which indicates that call origination services are to ... | 09/30/1997 |
| 5668860 | Call screening at a hierarchical switch based on organizational membership of the parties A telecommunication network has first and second subscribers connected to first and second telecommunication switches, respectively. A third switch is disposed at a hierarchical level above the second switch and receives a call setup message. The call set... | 09/16/1997 |
| 5652790 | Hierarchical switch support of services for subscribers based on organizational membership A telecommunication network includes first subscribers supported by a first local telecommunication switch. A first signal is received from the first switch at a second telecommunication switch disposed at a hierarchical level above the first switch. The ... | 07/29/1997 |
| 5646985 | Hierarchical switch support of services for subscribers of independent private branch exchanges A telecommunication network includes first subscribers served by a first independent PBX supported by a first telecommunication switch. The first switch receives a first signal from the first PBX indicating that call origination services for a first subsc... | 07/08/1997 |
| 5633924 | Telecommunication network with integrated network-wide automatic call distribution A plurality of telecommunication switches are coupled to agent communication terminals (ACTs) which are used by agents for handling incoming calls. An integrated control system is coupled to the ACTs and controls the distribution of incoming calls among t... | 05/27/1997 |
| 5623578 | Speech recognition system allows new vocabulary words to be added without requiring spoken samples of the words A speech recognition method implemented in a computer system recognizes words without requiring prior creation of models for such words based on spoken entries. A key word is entered in nonspoken form and a string of phonemes are defined by the speech rec... | 04/22/1997 |
| 5623680 | Finite state machine for process control A model of a finite state machine suited for implementation in a microcomputer includes logical specifications stored in memory which determine whether a change of outputs should be effected in response to predetermined combinations of input parameters an... | 04/22/1997 |
| 5623643 | Telecommunication system with improved reconfiguration flexibility having first and second communication modules where new operating system is tested with isolated second communication modules A second set of telecommunication devices is arranged to substantially mirror a first set of telecommunication devices in order to provide redundancy. First and second computer modules are included, respectively, in the first and second sets of devices wh... | 04/22/1997 |
| 5619564 | Tone detector with improved performance in the presence of speech This tone detector which is suited for dual tone multifrequency (DTMF) digit detection, separates the pairs of tones into a low frequency and high frequency group in which the other frequency group is attenuated by filtering. The amplitude of the low and ... | 04/08/1997 |
| 5574782 | Minimizing service disruptions in handling call request messages where new message formats are needed in a telecommunication network A service control point (SCP) node operates under the control of computer program instructions which interpret message instructions generated by a service administrator. The message instructions provide a hierarchical command structure which permits the S... | 11/12/1996 |
| 5574780 | Controll of call features provided to a subscriber by a hierarchical telecommunication switch A telecommunication network includes a first telecommunication switch that supports subscribers coupled to the first switch and recognizes a request for call origination by a calling party on an associated communication line. The request for call originat... | 11/12/1996 |
| 5539815 | Network call routing controlled by a management node A network management node (10) collects trunk loading data and switch congestion data from switches in a telecommunication system. Path loading vectors (52, 56,) constraint vector (66), and switch congestion vector (76) are calculated and compared to yiel... | 07/23/1996 |
| 5539872 | Automated selection of a screen display to be presented in a computer system in response to a user inquiry Upon identification of an information category by the user, a set of windows is automatically identified based on predetermined associations with the user's input as stored in the database. Based on the selected set of window definitions, requests are tra... | 07/23/1996 |
| 5534913 | Apparatus and method for integrating downstream data transfer over a cable television channel with upstream data carrier by other media A split channel bridging unit includes a router that operates under the control of a control processor to route packets of information destined for a user to a modulator which is connected to the cable distribution head-end of the cable television system ... | 07/09/1996 |
| 5530724 | Echo canceler with automatic enablement/disablement on a per-call basis Echo cancellation can be enabled to cancel echoes on an outbound transmission path based on original signals on an inbound transmission path. A controller of echo canceler enablement monitors digitized control information contained in call origination mes... | 06/25/1996 |
| 5530945 | Infrastructure equipment in a wireless communication system serves different service providers Independent groups of wireless telephone subscribers (tenants) are supported by common infrastructure communication equipment including network controller (WNC) and a database that stores group membership A plurality of radio frequency base stations are d... | 06/25/1996 |
| 5528688 | Telephone battery feed circuit including noise reduction circuit A circuit and method minimizes undesired noise signals associated with the battery utilized in a telephone battery feed circuit. In one embodiment, the noise voltage is amplified and inverted in phase and added back to a location on the ring line in order... | 06/18/1996 |
| 5521912 | Time slot shifter enhances data concentration A data shift register receives and stores each time sample (digital word) carried by an inbound channel. A selector chooses for each time slot either the input digital word received during the same time slot or the digital word stored in the shift registe... | 05/28/1996 |
| 5519700 | Telecommunication system with synchronous-asynchronous interface Line cards provide an input/output interface between synchronous communication channels and an asynchronous network. An input line card generates a plurality of packets where each packet contains information carried by a group of synchronous communication... | 05/21/1996 |
| 5512935 | Apparatus and method for diplaying an alert to an individual personal computer user via the user's television connected to a cable television system A user's personal computer is coupled to a home controller which is, in turn connected to the input cable from a cable television system and to a set top box which determines the channel to be delivered to an associated television. The service provider tr... | 04/30/1996 |
| 5513174 | Telecommunication system with detection and control of packet collisions Line cards provide an input/output interface between synchronous communication channels and an asynchronous network. The input line card translates information received from the synchronous communication channels into packets for transmission to the async... | 04/30/1996 |
| 5491424 | System for measuring contamination resistance A test fixture is provided for testing the resistance associated with contamination material on the surface of electrical contacts mounted to a printed circuit board. A probe used to engage the contacts consists of first and second conductive probe segmen... | 02/13/1996 |
| 5488412 | Customer premises equipment receives high-speed downstream data over a cable television system and transmits lower speed upstream signaling on a separate channel In accordance with an embodiment of the present invention, a home controller receives signals from the cable television system and utilizes a cable demodulator tuned to the RF frequency of the channel which carries the data information. The cable demodula... | 01/30/1996 |
| 5483590 | Processing of operational data in telecommunication system A data analysis processor receives data collected from switch is and applies a plurality of stored rules to yield corresponding test results. If a test result exceeds stored boundary conditions corresponding to the test, an exception condition is determin... | 01/09/1996 |
| 5479398 | Digital data concentrator First multiplexers have inputs connected to communication channels which carry inbound digital words. The output of each of the first multiplexers is coupled to a control buffer that has its output connected to a data input of a random access memory (RAM)... | 12/26/1995 |
| 5475746 | Method for permitting subscribers to change call features in real time A telephone subscriber to a long distance telecommunication system is permitted, in accordance with this invention, to enter changes in real time utilizing a conventional Touch-tone telephone to control the routing or handling of incoming calls. A real-ti... | 12/12/1995 |
| 5473531 | Finite state machine with minimized memory requirements A set of indexes associated with each state of the finite state machine provides an address locator to a location in memory of a microprocessor where sets of logical vectors are stored. A count stored in a group of logical vectors identifies the number of... | 12/05/1995 |
| 5473254 | Test probe assembly provides precise and repeatable contact forces A test fixture is provided for testing the resistance associated contamination material on the surface of electrical contacts mounted to a printed circuit board. An elongated probe is provided which has an axis perpendicular to X and Y planes. A mechanism... | 12/05/1995 |
