Patents Represented by Attorney, Agent or Law Firm Loria B. Yeadon
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Patent number: 5882951Abstract: An InP-based opto-electronic integrated circuit including an active layer having one or more quantum wells (36, 38). According to the invention, a barrier layer (34) of AlGaInAs is formed, preferably between the quantum wells and the substrate (30) to prevent the migration of species from the substrate and lower InP layers that tend to shift the emission wavelengths of the quantum wells to shorter wavelengths, i.e., a blue shift. The barrier layer can be patterned so that some areas of the quantum wells exhibit blue shifting to a shorter wavelength while other areas retain their longer wavelength during annealing.Type: GrantFiled: June 18, 1997Date of Patent: March 16, 1999Assignee: Bell Communications Research, Inc.Inventor: Rajaram Bhat
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Patent number: 5883946Abstract: A system for interfacing a service activation controller and a service management system allows a remote system to generate, update and delete call processing records and to create, update and delete tables. A provisioning message with one or more requests is sent to the service management system to process each request in the message, which identifies a unique logic template and one or more data templates and includes customized call variables data for inserting into a service record created from the template or updating an already created record. The resulting service record is activated by inputting the request to an integrated service point.Type: GrantFiled: November 27, 1996Date of Patent: March 16, 1999Assignee: Bell Communications Research, Inc.Inventors: Douglas Beck, Albert L. Chan, Sary Tauv, Lei Lei Wang, Patrick K. White
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Patent number: 5884181Abstract: An apparatus and method for reducing interference between an uplink transmitter of a space-based wireless communication system and an uplink or downlink receiver of a terrestrial wireless communication system are described. The space-based system may be a Fixed Satellite Service (FSS) system and the terrestrial system may be a Local Multipoint Distribution Service (LMDS) system. An ordered list of preferred uplink transmission frequencies is assigned to all FSS uplinks located in a particular cell of the LMDS system. Different ordered lists are used in different cells of the LMDS system, while uplinks located in the same cell can utilize the same ordered list. A given potentially-interfering uplink transmitter selects an uplink transmission frequency from the appropriate ordered list if the uplink is unable to operate outside the LMDS frequency band and there are no gaps in the LMDS spectrum which can accommodate the uplink transmission.Type: GrantFiled: January 19, 1996Date of Patent: March 16, 1999Assignee: Bell Communications Research, Inc.Inventors: Hamilton W. Arnold, Scott Yates Seidel
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Patent number: 5878224Abstract: An apparatus and method for preventing overload of a network server by messages received from a source initiating network server transactions. The method and apparatus use available network traffic measurements to estimate target transaction rates and admission factors. The method includes the steps, executed by a processor, of establishing a target incoming transaction workload per measurement interval (602), estimating from measurements obtained during the measurement interval the transaction workload offered by a source (604), and reducing a rate at which new transactions are initiated by the source to match the incoming transaction workload to the target workload when the offered transaction workload exceeds a threshold (606).Type: GrantFiled: April 30, 1997Date of Patent: March 2, 1999Assignee: Bell Communications Research, Inc.Inventor: Donald Edward Smith
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Patent number: 5870452Abstract: In the proposed Local Number Portability (LNP) telecommunications network, the traditional link between the first six digits of a ten-digit dialed number and the geographic link of a switch is broken. Some pre-LNP telephone services, however, have been implemented based on this geographic link. For the services to continue to work in an LNP environment, network databases must be simultaneously updated with information reflecting the fact that subscribers have switched from one local service provider to another. If these databases are not simultaneously updated, the possibility for looping messages between network elements arises. The present invention provides a method and system for controlling looping messages between network elements wherein a unique code for each incoming message is generated and stored along with the time the message was received.Type: GrantFiled: March 31, 1997Date of Patent: February 9, 1999Assignee: Bell Communications Research, Inc.Inventors: John D. Hayduk, Patricia Huang, Lawrence Chien, Alexander Jodidio, Carla A. Wood, Debbie Edwards
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Patent number: 5848141Abstract: A system and method for creating a call processing record that receives a provisioning request including call data, a logic template identifier, and one or more data template identifiers. The logic template and the data templates are identified based on the logic template identifier and the data template identifiers. The templates are accessed and the call data is inserted into call variables in the templates to create a call processing record with multiple blocks.Type: GrantFiled: November 27, 1996Date of Patent: December 8, 1998Assignee: Bell Communications Research, Inc.Inventors: Douglas Beck, Jeffrey R. Evans, Gregory M. Fisher, Donald E. Gillespie, Sary Tauv, Lei-Lei Wang
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Patent number: 5840087Abstract: Formation of a unitary laminate rechargeable battery comprising electrode and separator/electrolyte elements of polymer composition utilizes apparatus comprising compression rollers of sufficient hardness to resist deformation during laminating contact with such elements. Maximum progressive compression short of lateral deformation of battery elements ensures expulsion of interfacial entrapments and optimum functional contact between laminate elements. Battery structures fabricated with the apparatus may comprise active particulate component ratios in excess of about 75% by weight.Type: GrantFiled: September 18, 1996Date of Patent: November 24, 1998Assignee: Bell Communications Research, Inc.Inventors: Antoni S. Gozdz, Paul C. Warren
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Patent number: 5840371Abstract: A coating of a vinylidene fluoride polymer on a metal foil is heated at about 350.degree. C. to 450.degree. C. in a non-oxidizing atmosphere of inert gas to provide a rechargeable battery current collector having an exceptional bonding surface which maintains a long-lasting and highly-conductive laminate interface with an associated polymeric battery electrode composition.Type: GrantFiled: July 2, 1997Date of Patent: November 24, 1998Assignee: Bell Communications Research, Inc.Inventor: Paul C. Warren
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Patent number: 5841563Abstract: A technique for delivering analog video over fiber-to-the-home (FTTH) networks addresses a fundamental problem of the standard signal format, i.e., power budget constraint, by increasing the usable optical signal efficiency. In particular, a technique is provided for transmitting an efficient modified analog video which is compatible with existing receivers. More specifically, the synchronization portion of a standard NTSC video signal is reduced in amplitude during transmission, producing an appreciable increase in the allowable optical modulation index (OMI).Type: GrantFiled: October 29, 1996Date of Patent: November 24, 1998Assignee: Bell Communications Research, Inc.Inventor: Frank J. Effenberger
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Patent number: 5838035Abstract: A ferroelectric cell in which a ferroelectric stack of a perovskite ferroelectric sandwiched by cubic perovskite metal-oxide conductive electrodes are formed over a silicon body, such as a polysilicon plug penetrating a field oxide over a silicon transistor. According to the invention, an oxidation barrier is placed between the lower metal-oxide electrode and the polysilicon. The oxidation barrier may be: (1) a refractory metal sandwiched between two platinum layer which forms a refractory oxide in a platinum matrix; (2) an intermetallic barrier beneath a platinum electrode, e.g., of NiAl; or (3) a combination of Ru and SrRuO.sub.3 or similar materials. Thereby, the polysilicon plug is protected from oxidation.Type: GrantFiled: June 10, 1997Date of Patent: November 17, 1998Assignee: Bell Communications Research, Inc.Inventor: Ramamoorthy Ramesh
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Patent number: 5832519Abstract: A data processing system (10) comprising a general purpose computer (20) for carrying out database processing operations. An aggregation system (30) is in communication with the general purpose computer (20). The aggregation system (30) includes a memory (32) for storing, for each of a plurality of data values, a base value and one or more incremental updates. An aggregation processor (34) forming part of the aggregation system (30) receives the incremental updates from the general purpose computer (20), writes the incremental updates into the memory (32), and controls the aggregation of base values and incremental updates stored in said memory (32) to read the data values. In this manner data values are updated and read without the use of locking operations.Type: GrantFiled: December 21, 1993Date of Patent: November 3, 1998Assignee: Bell Communications Research, Inc.Inventors: Thomas Floyd Bowen, William Hill Mansfield
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Patent number: 5832072Abstract: A method and apparatus are disclosed for delivering calling line information in a manner which preserves the privacy interests of the caller while providing useful information to the called party. The caller initiates a call from a caller terminal of a communication network. A destination central office or other network element receives the call along with a complete calling line number and delivers partial calling line information to the called party prior to connecting the call. The partial calling line information may include an NPA-NXX portion of an NPA-NXX-XXXX calling line number, geographical information such as state, county, city, township and zip code associated with the calling line, and/or an indication as to whether the call is from a residence, business, pay phone, cellular phone or other particular source such as a hospital or hotel.Type: GrantFiled: November 27, 1996Date of Patent: November 3, 1998Assignee: Bell Communications Research, Inc.Inventor: Moshe Rozenblit
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Patent number: 5822681Abstract: A number of RPs stagger the times in which they begin searching for available channels. In a preferred method, one of a plurality of RPs in a UPCS system is selected to have a first start time. The system determines which RPs in the system can "see" the selected RP. Each of these RPs is given a unique stagger start time. This process may be repeated until each RP in the system is assigned a stagger start time. Alternatively, if there are fewer RPs in the system than there are available stagger start times, each RP may be selected to have a unique stagger start time.Type: GrantFiled: January 24, 1996Date of Patent: October 13, 1998Assignee: Bell Communications Research, Inc.Inventors: Li-Fung Chang, Anthony Robert Noerpel, Ashok Ranade, Nelson Ray Sollenberger
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Patent number: 5812794Abstract: A data network system for communicating data between a plurality of data generating systems externally connected to the data network system and a plurality of application systems externally connected to the data network system The data network system provides source objects corresponding to the data generating systems and destination objects corresponding to the application systems. The destination objects defining processes performed on data provided to corresponding application systems. The data generating systems generate data to be collected. The data network system creates container objects to contain the collected data, and identifies a destination object from the container objects to receive the container objects. The data network system also processes the container objects in accordance with the processes defined by the identified destination object, and transmits data corresponding to the processed container objects to the application system corresponding to the identified destination object.Type: GrantFiled: October 1, 1996Date of Patent: September 22, 1998Assignee: Bell Communications Research, Inc.Inventors: Lee Edward Heindel, Elizabeth Ann Gene, Barry Franklin Hoffner, Vincent Alan Kasten, Refen Koh, Thillastanam Krishnaswamy Ramaprasad
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Patent number: 5809140Abstract: Methods and apparatus are disclosed for providing secure session key distribution using a smart circuit card or other intelligent device. First and second hosts communicate with each other and with a server over a communication network. The first host initiates the session key distribution process by transmitting a session identifier to the server. The first host uses a first smart card storing the first host secret key to generate a first message in the form of a random bit stream which is transmitted to the second host. The server generates a second message as a function of the server secret key and the session identifier, and transmits it to the first host. The second host uses a second smart card storing the second host secret key to generate a third message as a function of the second host secret key and the first message, and transmits the third message to the first host.Type: GrantFiled: October 15, 1996Date of Patent: September 15, 1998Assignee: Bell Communications Research, Inc.Inventors: Aviel D. Rubin, Victor J. Shoup
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Patent number: 5798903Abstract: A ferroelectric capacitor structure and its method of making in which a ferroelectric stack of two metal-oxide electrodes sandwiching a ferroelectric layer is fabricated on a silicon substrate with an intervening barrier layer, preferably of TiN. In one embodiment, a platinum layer is grown between the TiN and the lower metal-oxide electrode at a sufficiently high temperature that provides crystallographically ordered growth of the ferroelectric stack. In another embodiment, the platinum layer was completely eliminated with the lower electrode being grown directly on the TiN. Although the conventional conductive metal-oxide used in the electrode is lanthanum strontium cobalt oxide (LSCO), lanthanum nickel oxide provides good electrical and lifetime characteristics in a ferroelectric cell. Alternatively, the electrodes can be formed of the rock-salt metal oxides, such as neodymium oxide (NdO).Type: GrantFiled: December 26, 1995Date of Patent: August 25, 1998Assignees: Bell Communications Research, Inc., University of MarylandInventors: Anil M. Dhote, Ramamoorthy Ramesh
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Patent number: 5796729Abstract: Disclosed is a telecommunication system that is both highly cost effective for small scale applications (for example, those having less than 80 lines), yet field upgrade-expandable to applications having a significant number of additional lines (for example, 30,000 lines). An integrated voice/data telecommunication system is utilized that is flexible enough to handle low bandwidth (for example 64 kbps mu-law) speech as well as high bandwidth multimedia data switching. The system may be configured as a low cost, standalone PACS system for "village telephony" or "PACS-on-POTS" applications, as an alternative to requirements for PACS infrastructure when appropriate wireless network facilities are unavailable.Type: GrantFiled: May 9, 1996Date of Patent: August 18, 1998Assignee: Bell Communications Research, Inc.Inventors: Shaun J. Greaney, Kenneth W. Leland
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Patent number: 5796424Abstract: A broadband system includes a broadband switch network, a broadband session controller, and a broadband service control point. The broadband network provides connections between information sender/receivers in response to instructions from a broadband service control point or in response to requests originated by an information sender/receiver. The broadband service control point provides processing instructions and/or data to the broadband controller and information sender/receiver. Applications supported by the broadband network include video-on-demand and videoconferencing services for system users. For video-on-demand, a settop controller is associated with a video display of each system user. One or more video information providers ("VIPs") stores video information to be sent to the user's settop controller via the broadband switch network.Type: GrantFiled: November 1, 1996Date of Patent: August 18, 1998Assignee: Bell Communications Research, Inc.Inventors: Thomas Chambers Ely, Darek Andrew Smyk
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Patent number: 5796902Abstract: A waveguide having alternating regions of different crystallographic orientations, thereby providing quasi-phase-matching for a non-linear frequency conversion, in which two wafers with or without epitaxial layers thereon are bonded together having different, preferably opposed, crystallographic orientations. One wafer is etched away, and a grating is etched such that one part of the grating has the orientation of one wafer and the other part has the orientation of the other wafer. Thereafter, a waveguide structure is epitaxially deposited upon the differentially oriented template so that the waveguide is differentially oriented in its axial direction. Thereby, quasi-phase-matching non-linear effects can be achieved. Several important devices can thereby be achieved, including a coherent optical source using frequency doubling and a frequency converter useful in wavelength division multiplexed communication, as well as others.Type: GrantFiled: July 5, 1996Date of Patent: August 18, 1998Assignee: Bell Communications Research, Inc.Inventors: Rajaram Bhat, Catherine Caneau, Mark A. Koza, Sung Joo Yoo
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Patent number: 5794053Abstract: A system for creating user defined software interface contracts for sending host system data to any external system. The external systems can reside on any type of hardware platform. The invocation of a contract is controlled by a set of user defined conditions known as an event. The creation of event and contracts is completely under the control of the users of the external systems with little or no support of the host system developers to establish new interfaces to the external systems.Type: GrantFiled: July 22, 1996Date of Patent: August 11, 1998Assignee: Bell Communications Research, Inc.Inventors: Daniel Joseph Doris, Jr., Donald Joseph Solar