Patents by Inventor David Hammond
David Hammond 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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Patent number: 11976377Abstract: Described herein are methods of applying metals to substrates, where the methods include contacting the substrate with an aqueous metal plating composition comprising polyammonium bisulfate (“PABS”) and a dissolved metal or salt thereof. The methods allow application of metals to the substrate without need for electrical energy input or for an added chemical catalyst, chelating agent, complexing agent, reducing agent, stabilizer, or pH-modifying (or controlling) chemical compound.Type: GrantFiled: December 14, 2022Date of Patent: May 7, 2024Assignee: EARTH SCIENCE LABORATORIES, INC.Inventors: Nam Tran, John A. Hatten, Jr., Reid Henry Bowman, Jeffrey Alan Keiser, David Hammond, Freddie L. Singleton, David Nicholas
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Publication number: 20230257895Abstract: Described herein are methods of applying metals to substrates, where the methods include contacting the substrate with an aqueous metal plating composition comprising polyammonium bisulfate (“PABS”) and a dissolved metal or salt thereof. The methods allow application of metals to the substrate without need for electrical energy input or for an added chemical catalyst, chelating agent, complexing agent, reducing agent, stabilizer, or pH-modifying (or controlling) chemical compound.Type: ApplicationFiled: December 14, 2022Publication date: August 17, 2023Applicant: Earth Science Laboratories, Inc.Inventors: Nam Tran, John A. Hatten, JR., Reid Henry Bowman, David Hammond, David Nicholas, Freddie L. Singleton
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Publication number: 20210250071Abstract: A method for 5G digital beamforming testing includes receiving emulated UE spatial positions. The method includes computing phase vectors for the emulated UEs based on the emulated UE spatial positions and communicating the phase vectors to a DUT. The method includes receiving beam weight sets from the DUT and storing the beam weight sets. The method includes computing scores for the emulated UE spatial positions from the beam weight sets and the phase vectors, and receiving, from the DUT, spatial streams and identifiers of beam weight sets to be used to transmit the spatial streams to the emulated UEs. The method includes identifying, using scores corresponding to the beam weight sets to be used to transmit the spatial streams to the emulated UEs, associations between the spatial streams and the emulated UE spatial positions. The method includes processing data in the spatial streams using the emulated UEs.Type: ApplicationFiled: February 7, 2020Publication date: August 12, 2021Inventors: David Hammond, Steffen Beyme
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Patent number: 11088744Abstract: A method for 5G digital beamforming testing includes receiving emulated UE spatial positions. The method includes computing phase vectors for the emulated UEs based on the emulated UE spatial positions and communicating the phase vectors to a DUT. The method includes receiving beam weight sets from the DUT and storing the beam weight sets. The method includes computing scores for the emulated UE spatial positions from the beam weight sets and the phase vectors, and receiving, from the DUT, spatial streams and identifiers of beam weight sets to be used to transmit the spatial streams to the emulated UEs. The method includes identifying, using scores corresponding to the beam weight sets to be used to transmit the spatial streams to the emulated UEs, associations between the spatial streams and the emulated UE spatial positions. The method includes processing data in the spatial streams using the emulated UEs.Type: GrantFiled: February 7, 2020Date of Patent: August 10, 2021Assignee: KEYSIGHT TECHNOLOGIES, INC.Inventors: David Hammond, Steffen Beyme
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Patent number: 10841025Abstract: Methods, systems, and computer readable media for testing a central unit using a distributed unit emulation are disclosed. One exemplary method includes receiving, by a distributed unit emulation component of a mobile network device, an ingress signal from a central unit device over an evolved common public radio interface (eCPRI) link and communicating, by the distributed unit emulation component, a time domain based ingress signal containing data originally included in the received ingress signal to a plurality of user equipment (UE) emulations. The method also includes utilizing, by at least one of the plurality of UE emulations, the time domain based ingress signal to generate test traffic data for stress testing the central unit device. The method further includes communicating a time domain based egress signal including the test traffic data to the central unit device via the distributed unit emulation component.Type: GrantFiled: August 30, 2018Date of Patent: November 17, 2020Assignee: Keysight Technologies, Inc.Inventor: David Hammond
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Publication number: 20200076521Abstract: Methods, systems, and computer readable media for testing a central unit using a distributed unit emulation are disclosed. One exemplary method includes receiving, by a distributed unit emulation component of a mobile network device, an ingress signal from a central unit device over an evolved common public radio interface (eCPRI) link and communicating, by the distributed unit emulation component, a time domain based ingress signal containing data originally included in the received ingress signal to a plurality of user equipment (UE) emulations. The method also includes utilizing, by at least one of the plurality of UE emulations, the time domain based ingress signal to generate test traffic data for stress testing the central unit device. The method further includes communicating a time domain based egress signal including the test traffic data to the central unit device via the distributed unit emulation component.Type: ApplicationFiled: August 30, 2018Publication date: March 5, 2020Inventor: David Hammond
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Patent number: 10099947Abstract: A water treatment solution may include a metal salt and a base product fluid. The base product fluid may include a molecular compound that is a chelating compound. The molecular compound may have the formula: ((NH4)2SO4)a.(H2SO4)b.(H2O)c.(NH4HSO4)x. In the formula, a may be between 1 and 5, b may be between 1 and 5, c may be between 1 and 5, and x may be between 1 and 10. The water treatment solution may be formed by adding the metal salt to the base product fluid and water. The water treatment solution may be added to water in need of treatment. The water in need of treatment may be a static body of water.Type: GrantFiled: June 16, 2016Date of Patent: October 16, 2018Assignee: Earth Science LaboratoriesInventors: David Nicholas, Reid Henry Bowman, David Hammond, Freddie L. Singleton
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Patent number: 9927040Abstract: A rotary valve comprising a rotor shaft support assembly for maintaining a rotor shaft 5 in a level orientation when the rotor shaft is supported at a single end only. The rotor shaft support assembly (101) comprises a removable casing end plate (102) and a bearing assembly (106) for supporting an end portion of the rotor shaft (104) inserted into the rotor shaft support assembly (101) and through a rotor shaft aperture (105) of the removable casing end plate (102), and is adjustable to correct any deviation of 10 the pitch of the rotor shaft (104) from a level orientation relative to the removable casing end plate (102) when the rotor shaft (104) is supported at a single end only by the rotor shaft support assembly (101) with the inserted end portion of the rotor shaft (104) supported within the removable casing end plate (102) and the bearing assembly (106).Type: GrantFiled: September 24, 2015Date of Patent: March 27, 2018Assignee: Rota Val LtdInventors: David Hammond, Derek Smith
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Patent number: 9537875Abstract: At least some incoming traffic is distributed into a first set of traffic groups according to a first grouping scheme. Communication activity from a potentially malicious source may be grouped in a given traffic group in which communication activity from an acceptable source is also grouped. Potentially malicious communication activity is detected in the given traffic group. Traffic in the given traffic group is processed using a first traffic processing mode associated with potentially malicious communication activity, in which at least some traffic that is distributed into the given traffic group is discarded. In response to a dynamic trigger the grouping scheme is altered to one or more further grouping schemes in order that the communication activity from the acceptable source is likely to be subsequently grouped into a traffic group which is different to a group into which the communication activity from the potentially malicious source is subsequently grouped.Type: GrantFiled: February 28, 2014Date of Patent: January 3, 2017Assignee: Metaswitch Networks Ltd.Inventor: David Hammond
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Publication number: 20160368794Abstract: A water treatment solution may include a metal salt and a base product fluid. The base product fluid may include a molecular compound that is a chelating compound. The molecular compound may have the formula: ((NH4)2SO4)a.(H2SO4)b.(H2O)c.(NH4HSO4)x. In the formula, a may be between 1 and 5, b may be between 1 and 5, c may be between 1 and 5, and x may be between 1 and 10. The water treatment solution may be formed by adding the metal salt to the base product fluid and water. The water treatment solution may be added to water in need of treatment. The water in need of treatment may be a static body of water.Type: ApplicationFiled: June 16, 2016Publication date: December 22, 2016Inventors: David Nicholas, Reid Henry Bowman, David Hammond, Freddie L. Singleton
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Publication number: 20160090831Abstract: An electric auger-boring machine. The machine has electric motors for auger rotation and thrust. The electric rotation motor rotates the auger at a constant rate when the current provided is constant. The motor may slow or stop in response to changes in torque due to obstructions to auger rotation. Electric motors allow for auger thrusters and actuators to precisely operate. A wireless remote control controls motor and auger rotation and thrust from a distance away from a launch pit. Multiple sizes of product casings may be utilized and the auger-boring machine comprises an adjustable adaptor and saddle for use with a plurality of casing sizes.Type: ApplicationFiled: September 30, 2015Publication date: March 31, 2016Inventors: William Malcolm, Reed Carpenter, Robert Michael Colangelo, David Hammond, Brian Hollis, Kalpeshkumar V. Patel, Rick Rockwell, Stuart Riggenbach
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Publication number: 20160091105Abstract: A rotary valve comprising a rotor shaft support assembly for maintaining a rotor shaft 5 in a level orientation when the rotor shaft is supported at a single end only. The rotor shaft support assembly (101) comprises a removable casing end plate (102) and a bearing assembly (106) for supporting an end portion of the rotor shaft (104) inserted into the rotor shaft support assembly (101) and through a rotor shaft aperture (105) of the removable casing end plate (102), and is adjustable to correct any deviation of 10 the pitch of the rotor shaft (104) from a level orientation relative to the removable casing end plate (102) when the rotor shaft (104) is supported at a single end only by the rotor shaft support assembly (101) with the inserted end portion of the rotor shaft (104) supported within the removable casing end plate (102) and the bearing assembly (106).Type: ApplicationFiled: September 24, 2015Publication date: March 31, 2016Applicant: Rota Val LtdInventors: David Hammond, Derek Smith
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Patent number: 9172626Abstract: Methods, systems, and computer readable media for preventing traffic congestion in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device are disclosed. In one example, a method includes transmitting, from a first module to a second module over a shared bus, one of a plurality of LTE subframe signal portions at the beginning of a first transmission interval. The method further includes sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion. The method also includes forwarding, from the third module to the second module over the shared bus, decoded control information associated with at least one of the plurality of LTE subframe signal portions during an idle time period defined by the receipt of the trigger signal and the beginning of a second transmission interval.Type: GrantFiled: March 12, 2012Date of Patent: October 27, 2015Assignee: IxiaInventors: Damon Lee Campbell, David Hammond, William Clarry Hough, Eric Hugh Wilke
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Patent number: 8906608Abstract: The present invention relates to the fields of molecular biology, combinatorial chemistry and biochemistry. Particularly, the present invention describes methods and kits for dynamically reducing the variance between analyte taken from complex mixtures.Type: GrantFiled: July 28, 2006Date of Patent: December 9, 2014Assignees: Bio-Rad Laboratories, Inc., American National Red CrossInventors: Egisto Boschetti, David Hammond
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Publication number: 20140181977Abstract: At least some incoming traffic is distributed into a first set of traffic groups according to a first grouping scheme. Communication activity from a potentially malicious source may be grouped in a given traffic group in which communication activity from an acceptable source is also grouped. Potentially malicious communication activity is detected in the given traffic group. Traffic in the given traffic group is processed using a first traffic processing mode associated with potentially malicious communication activity, in which at least some traffic that is distributed into the given traffic group is discarded. In response to a dynamic trigger the grouping scheme is altered to one or more further grouping schemes in order that the communication activity from the acceptable source is likely to be subsequently grouped into a traffic group which is different to a group into which the communication activity from the potentially malicious source is subsequently grouped.Type: ApplicationFiled: February 28, 2014Publication date: June 26, 2014Applicant: Metaswitch Networks LtdInventor: David HAMMOND
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Publication number: 20140083329Abstract: In one or more embodiments, the present disclosure provides for a process for preparing a dispersion of starch particles in an aqueous liquid. In one or more embodiments, the process includes introducing a feed starch and the aqueous liquid into a rotor stator mixer, maintaining the feed starch and the aqueous liquid in the rotor stator mixer at a temperature ranging from a gelation temperature to less than a solubilization temperature, and shearing the feed starch into starch particles with the rotor stator mixer to form the dispersion of starch particles in the aqueous liquid. In one or more embodiments, the starch particles produced by this process have an average particle size diameter of no larger than 2 micrometers and the dispersion has 20 to 65 weight percent of the starch particles based on a total weight of the dispersion.Type: ApplicationFiled: November 26, 2013Publication date: March 27, 2014Applicant: DOW GLOBAL TECHNOLOGIES LLCInventors: Gregory Welsch, Brian Ninness, Michael Read, Timothy Young, Michal Matteucci, David Hammond, Liang Hong, Donald Ervick, JR.
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Publication number: 20130235727Abstract: Methods, systems, and computer readable media for preventing traffic congestion in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device are disclosed. In one example, a method includes transmitting, from a first module to a second module over a shared bus, one of a plurality of LTE subframe signal portions at the beginning of a first transmission interval. The method further includes sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion. The method also includes forwarding, from the third module to the second module over the shared bus, decoded control information associated with at least one of the plurality of LTE subframe signal portions during an idle time period defined by the receipt of the trigger signal and the beginning of a second transmission interval.Type: ApplicationFiled: March 12, 2012Publication date: September 12, 2013Inventors: Damon Lee Campbell, David Hammond, William Clarry Hough, Eric Hugh Wilke
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Patent number: 8229416Abstract: Methods, systems, and computer readable media for stress testing mobile network equipment using CPRI are disclosed. According to one method, a plurality of messages is generated for simulating a plurality of user equipment (UE) devices. The plurality of messages is transmitted over a common public radio interface (CPRI) link to a radio equipment controller (REC) in order to stress test the REC component.Type: GrantFiled: December 17, 2008Date of Patent: July 24, 2012Assignee: IxiaInventors: Arda Akman, Matthew Balkwill, David Hammond, Richard Karp, Edward Panofsky, Glenn Stewart, Kalyan Sundhar
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Publication number: 20100255521Abstract: Disclosed are compounds of the formula (I): wherein R3, R4, R5, R9, and R10 are selected from the group consisting of H and groups or atoms other than H, and R6 and R8 are halo or hydrogen; X1, X2, and X3 are independently O or S; provided that R9 and R10 are not simultaneously H, when all of X1, X2, and X3 are O; and of the formula (II) wherein R11-R14 are selected from the group consisting of H and groups or atoms other than H; X4-X9 are independently O or S; n and m are 0 or 1 but m and n cannot be 0 simultaneously; R15-R24 can be H or any substituent so long as the compound of formula II upon hydrolysis provides a fluorescent compound. These compounds are useful as substrates with high specificity for organophosphatase particularly human paraoxonase and bacterial organophosphorus hydrolase.Type: ApplicationFiled: January 3, 2007Publication date: October 7, 2010Inventors: Serguei Soukharev, David Hammond
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Publication number: 20100075678Abstract: Methods, systems, and computer readable media for stress testing mobile network equipment using CPRI are disclosed. According to one method, a plurality of messages is generated for simulating a plurality of user equipment (UE) devices. The plurality of messages is transmitted over a common public radio interface (CPRI) link to a radio equipment controller (REC) in order to stress test the REC component.Type: ApplicationFiled: December 17, 2008Publication date: March 25, 2010Inventors: Arda Akman, Matthew Balkwill, David Hammond, Richard Karp, Edward Panofsky, Glenn Stewart, Kalyan Sundhar