Patents by Inventor David Pfister
David Pfister has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240106679Abstract: This disclosure describes methods and systems to externally manage network-to-network interconnect configuration data in conjunction with a centralized database subsystem. An example of the methods includes receiving and storing, in the centralized database subsystem, data indicative of user intent to interconnect at least a first network and a second network. The example method further includes, based at least in part on the data indicative of user intent, determining and storing, in the centralized database subsystem, a network intent that corresponds to the user intent. The example method further includes providing data indicative of the network intent from the centralized database subsystem to a first data plane adaptor, associated with the first network, and a second data plane adaptor, associated with the second network.Type: ApplicationFiled: December 11, 2023Publication date: March 28, 2024Inventors: Pierre Pfister, William Mark Townsley, Yoann Desmouceaux, David Delano Ward
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Publication number: 20220166446Abstract: Techniques for achieving reductions in cost of encoding and decoding operations used in DNA data storage systems to facilitate reducing errors in those encoding and decoding operations while accounting for a code structure used during the encoding and decoding by constructing and using insertion-deletion-substitution (IDS) trellises for multiple traces are disclosed. A DNA sequencing channel is used to randomly sample and sequence DNA strands to generate noisy traces. Multiple trellises are independently constructed for each respective noisy trace. A forward-backward algorithm is run on each trellis to compute posterior marginal probabilities for vertices included in each trellises. An estimate of the data message sequence is then computed.Type: ApplicationFiled: November 24, 2020Publication date: May 26, 2022Inventors: Sergey Mikhailovich YEKHANIN, Sivakanth GOPI, Henry David PFISTER, Sundara Rajan SRINIVASAVARADHAN
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Patent number: 10377853Abstract: A process to prepare a polyester polymer composition comprising a polyester polymer having furanic units is disclosed. The process comprises a step of ring-opening polymerization of a cyclic polyester oligomer, which comprises residue of furandicarboxylic acid and a diol, in the presence of a catalyst in order to yield a polyester polymer having furanic units. The polyester polymer composition obtainable by the process, wherein the polyester polymer composition comprises a polyester polymer having furanic units and a cyclic polyester oligomer in a concentration of less than 5 wt % of the composition. The use of the polyester polymer composition in extrusion, injection molding, or blow molding are also disclosed.Type: GrantFiled: April 4, 2017Date of Patent: August 13, 2019Assignee: Sulzer Chemtech AGInventors: Liborio Ivano Costa, Philip Nising, Francesca Tancini, David Pfister, Giuseppe Storti, Massimo Morbidelli
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Publication number: 20170267812Abstract: A polyester polymer composition having a polyester polymer with furanic units as well as a process to prepare this polyester polymer composition are herein described. The process includes the step of reacting a cyclic polyester oligomer in the presence of a catalyst in a ring-opening polymerization reaction with a reaction temperature and a reaction time sufficient to yield a polyester polymer having furanic units. The present invention further provides a method of use of this polyester polymer composition in extrusion, injection molding, or blow molding.Type: ApplicationFiled: April 4, 2017Publication date: September 21, 2017Applicant: Sulzer Chemtech AGInventors: Liborio Ivano Costa, Philip Nising, Francesca Tancini, David Pfister, Giuseppe Storti, Massimo Morbidelli
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Patent number: 9725558Abstract: A process to prepare a cyclic polyester oligomer composition having a cyclic polyester oligomer having furanic units, includes the step of reacting a monomer component, for example, 2,5-furan dicarboxylic acid and, for example, ethylene glycol, in a ring closing oligomerization at a reaction temperature and reaction time, for example, at 100° C. to 350° C. for 30 to 600 minutes to obtain a cyclic polyester oligomer having furanic units. The process yields a cyclic polyester oligomer composition which can be used in further ring-opening polymerization reactions to produce a polyester polymer. The cyclic polyester oligomer composition has a cyclic polyester oligomer having furanic units and less than 5% linear oligomeric polyester species in the composition.Type: GrantFiled: November 27, 2013Date of Patent: August 8, 2017Assignee: Sulzer Chemtech AGInventors: Liborio Ivano Costa, Philip Nising, Francesca Tancini, David Pfister, Giuseppe Storti, Massimo Morbidelli
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Publication number: 20160017093Abstract: A process to prepare a cyclic polyester oligomer composition comprising a cyclic polyester oligomer having furanic units is disclosed. The process comprises the step of reacting a monomer component in the presence of an optional catalyst and/or optional organic base in a ring closing oligomerization step under conditions of a reaction temperature and reaction time sufficient to yield a cyclic polyester oligomer having furanic units. The invention further relates to a cyclic polyester oligomer composition obtainable by said process, wherein the cyclic polyester oligomer composition comprises a cyclic polyester oligomer of structure Y1 or Y2 having furanic units, wherein the composition contains less than 5%, preferably 3, most preferably 1 weight % of linear oligomeric polyester species in the composition. The present invention further relates also to the use of said cyclic polyester oligomer composition in the production of a polyester polymer.Type: ApplicationFiled: November 27, 2013Publication date: January 21, 2016Applicant: SULZER CHEMTECH AGInventors: Liborio Ivano Costa, Philip Nising, Francesca Tancini, David Pfister, Giuseppe Storti, Massimo Morbidelli
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Publication number: 20160002397Abstract: A process to prepare a polyester polymer composition comprising a polyester polymer having furanic units is disclosed. The process comprises the step of reacting a cyclic polyester oligomer in the presence of a catalyst in a ring-opening polymerization step under conditions of a reaction temperature and reaction time sufficient to yield a polyester polymer having furanic units. The invention further relates to a polyester polymer composition obtainable by said process, wherein the polyester polymer composition comprises a polyester polymer having furanic units and a cyclic polyester oligomer comprising either structure Y1 or Y2, preferably in a concentration of less than 5 wt %, more preferably less than 1, more preferably less than 0.5 in the composition. The present invention further relates also to the use of said polyester polymer composition in extrusion, injection molding, or blow molding.Type: ApplicationFiled: November 27, 2013Publication date: January 7, 2016Applicant: Sulzer Chemtech AGInventors: Liborio Ivano Costa, Philip Nising, Francesca Tancini, David Pfister, Giuseppeü Storti, Massimo Morbidelli
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Patent number: 8670428Abstract: Methods and mobile stations for transmitting, receiving and processing peer-to-peer communication signals without a base station or network element. A transmitting mobile station may alternate two or more long code masks to generate one or more pseudorandom noise (PN) codes to spread data for transmission. A receiving mobile station receives the spread data and achieves synchronization with the transmitting mobile station.Type: GrantFiled: March 14, 2005Date of Patent: March 11, 2014Assignee: QUALCOMM IncorporatedInventors: Roy Franklin Quick, Jr., Henry David Pfister
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Patent number: 8644264Abstract: Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.Type: GrantFiled: October 7, 2010Date of Patent: February 4, 2014Assignee: Qualcomm IncorporatedInventors: Alessandro Vanelli Coralli, Henry David Pfister, Jilei Hou, John Edward Smee, Roberto Padovani, Brian K. Butler, Jeffrey A. Levin, Thomas B. Wilborn, Paul E. Bender
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Patent number: 8611311Abstract: Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.Type: GrantFiled: June 30, 2005Date of Patent: December 17, 2013Assignee: Qualcomm IncorporatedInventors: Alessandro Vanelli Coralli, Henry David Pfister, Jilei Hou, John Edward Smee, Roberto Padovani, Brian K Butler, Jeffrey A Levin, Thomas B Wilborn, Paul E Bender
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Patent number: 8442441Abstract: A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.Type: GrantFiled: July 29, 2005Date of Patent: May 14, 2013Assignee: Qualcomm IncorporatedInventors: Henry David Pfister, Jilei Hou, John Edward Smee, Stefano Tomasin
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Patent number: 8422955Abstract: A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.Type: GrantFiled: July 29, 2005Date of Patent: April 16, 2013Assignee: Qualcomm IncorporatedInventors: John Edward Smee, Henry David Pfister, Jilei Hou, Stefano Tomasin
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Patent number: 8406695Abstract: A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.Type: GrantFiled: July 29, 2005Date of Patent: March 26, 2013Assignee: QUALCOMM IncorporatedInventors: Jilei Hou, Henry David Pfister, John Edward Smee, Stefano Tomasin
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Patent number: 8099123Abstract: A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.Type: GrantFiled: July 29, 2005Date of Patent: January 17, 2012Assignee: Qualcomm IncorporatedInventors: Stefano Tomasin, Henry David Pfister, Jilei Hou, John Edward Smee
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Publication number: 20110069736Abstract: Methods and systems for estimating and canceling pilot interference in a wireless (e.g., CDMA) communication system. In one method, a received signal comprised of a number of signal instances, each including a pilot, is initially processed to provide data samples. Each signal instance's pilot interference may be estimated by despreading the data samples with a spreading sequence for the signal instance, channelizing the despread data to provide pilot symbols, filtering the pilot symbols to estimate the channel response of the signal instance, and multiplying the estimated channel response with the spreading sequence. The pilot interference estimates due to a plurality of interfering multipaths are accumulated to derive the total pilot interference, which is subtracted from the data samples to provide pilot-canceled data samples. These samples are then processed to derive demodulated data for each of at least one (desired) signal instance in the received signal.Type: ApplicationFiled: October 7, 2010Publication date: March 24, 2011Applicant: QUALCOMM INCORPORATEDInventors: Alessandro Vanelli Coralli, Henry David Pfister, Jilei Hou, John Edward Smee, Roberto Padovani, Brian K. Butler, Jeffrey A. Levin, Thomas B. Wilborn, Paul E. Bender
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Patent number: 7458003Abstract: Methods and apparatuses to encode and decode information. One apparatus may use an encoder with a relatively low complexity, capacity-achieving code. The code may allow information to be reliably transmitted and received across a noisy medium or channel.Type: GrantFiled: November 30, 2004Date of Patent: November 25, 2008Assignee: QUALCOMM IncorporatedInventor: Henry David Pfister
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Patent number: 7213127Abstract: A system for generating addresses for a digital signal processor in which the program instructions include a code for accessing a memory associated with said processor. An address calculation circuit calculates each access address to the memory on the basis of operation codes designated by the address generation code of one of the instructions and of the content of one address register selected from said address registers. Each address generation code defines an operation code to be sent to the calculation circuit. Each of the address registers is further associated with a configuration register designated at the same time as the address register by the address generation code, and each of the configuration registers contains a set of predefined operation codes, each adapted to command a predetermined calculation operation in the calculation circuit.Type: GrantFiled: June 6, 2003Date of Patent: May 1, 2007Assignee: CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et DeveloppementInventors: Flavio Rampogna, Pierre-David Pfister, Jean-Marc Masgonty, Christian Piguet
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Publication number: 20040034758Abstract: The program instructions include a code for generating addresses for accessing one memory associated with said processor. An address calculation circuit calculates each access address to said memory on the basis of operation codes designated each time by the address generation code of the instructions and of the content of one address register selected from said address registers, and its associated offset and/or a modulo registers. Each address generation code of each instruction define an operation codes to be sent to said calculation circuit. Each of said address registers is further associated with a configuration register designated at the same time as said address register by said address, generation code, each of said configuration registers contains a set of predefined operation codes, each adapted to command a predetermined calculation operation in said calculation circuit and to be transferred to said calculation means, according to said address generation code.Type: ApplicationFiled: June 6, 2003Publication date: February 19, 2004Inventors: Flavio Rampogna, Pierre-David Pfister, Jean-Marc Masgonty, Christian Piguet