Patents by Inventor Anirban Das

Anirban Das 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).

  • Patent number: 11641724
    Abstract: An electronic device can include a housing component that can define an interior surface and an exterior surface of the device, a metallic film deposited on the interior surface and extending at least partially onto the exterior surface, and a ceramic film deposited on the exterior surface and at least partially over a portion of the metallic film on the exterior surface. The ceramic film can be in electrical communication with a portion of the metallic film deposited on the interior surface to form an electrical pathway from the exterior surface to the interior surface.
    Type: Grant
    Filed: January 27, 2022
    Date of Patent: May 2, 2023
    Assignee: APPLE INC.
    Inventors: Jiahui Liang, Anirban Das, Jungyup Kim, Martin Melcher, Srinivasan Varadharajan, Wolf Oetting
  • Publication number: 20220383091
    Abstract: For a plurality of client computing devices of a federated learning system, obtain initial compressed embeddings, compressed by clustering, and including output of initial local models for a current minibatch, and initial cluster labels corresponding to the initial embeddings. Recreate an initial overall embedding based on the initial embeddings and the initial labels. At a server of the federated learning system, send a current version of a server model to each of the client computing devices; and obtain, from the client computing devices: updated compressed embeddings, compressed by clustering, and updated cluster labels corresponding to the updated embeddings. Based on local training by the plurality of clients with the overall embedding and the current server model, at the server, recreate an updated overall embedding based on the updated embeddings and the corresponding updated labels, and locally train the server model based on the updated overall embedding.
    Type: Application
    Filed: May 25, 2021
    Publication date: December 1, 2022
    Inventors: Anirban Das, Timothy John Castiglia, Stacy Elizabeth Patterson, Shiqiang Wang
  • Publication number: 20220151094
    Abstract: An electronic device can include a housing component that can define an interior surface and an exterior surface of the device, a metallic film deposited on the interior surface and extending at least partially onto the exterior surface, and a ceramic film deposited on the exterior surface and at least partially over a portion of the metallic film on the exterior surface. The ceramic film can be in electrical communication with a portion of the metallic film deposited on the interior surface to form an electrical pathway from the exterior surface to the interior surface.
    Type: Application
    Filed: January 27, 2022
    Publication date: May 12, 2022
    Inventors: Jiahui Liang, Anirban Das, Jungyup Kim, Martin Melcher, Srinivasan Varadharajan, Wolf Oetting
  • Patent number: 11272631
    Abstract: An electronic device can include a housing component that can define an interior surface and an exterior surface of the device, a metallic film deposited on the interior surface and extending at least partially onto the exterior surface, and a ceramic film deposited on the exterior surface and at least partially over a portion of the metallic film on the exterior surface. The ceramic film can be in electrical communication with a portion of the metallic film deposited on the interior surface to form an electrical pathway from the exterior surface to the interior surface.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: March 8, 2022
    Assignee: Apple Inc.
    Inventors: Jiahui Liang, Anirban Das, Jungyup Kim, Martin Melcher, Srinivasan Varadharajan, Wolf Oetting
  • Publication number: 20210076525
    Abstract: An electronic device can include a housing component that can define an interior surface and an exterior surface of the device, a metallic film deposited on the interior surface and extending at least partially onto the exterior surface, and a ceramic film deposited on the exterior surface and at least partially over a portion of the metallic film on the exterior surface. The ceramic film can be in electrical communication with a portion of the metallic film deposited on the interior surface to form an electrical pathway from the exterior surface to the interior surface.
    Type: Application
    Filed: September 9, 2019
    Publication date: March 11, 2021
    Inventors: Jiahui Liang, Anirban Das, Jungyup Kim, Martin Melcher, Srinivasan Varadharajan, Wolf Oetting
  • Patent number: 10902117
    Abstract: According to one embodiment, a computerized method for acquiring updated predictive model is described. The updated predictive model is achieved through machine learning analyses of information by a training engine, which issues a control message in response to a discrepancy in a determination of the suspect object as malicious or non-malicious by a detection engine and a classification engine. The detection engine analyzes a content of a suspect object to determine whether the suspect object is malicious or non-malicious. Similarly, the classification engine analyses the suspect object based on the predictive model to determine whether the suspect object is malicious or non-malicious. The control message causes the training engine to update the predictive model based on machine learning analyses of information provided via the control message and to return an updated predictive model to the classification engine.
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: January 26, 2021
    Assignee: FireEye, Inc.
    Inventors: Abhishek Singh, Ali Mesdaq, Anirban Das, Varun Jain
  • Patent number: 10366231
    Abstract: According to one embodiment, an apparatus comprises a first analysis engine and a second analysis engine. The first analysis engine analyzes an object to determine if the object is malicious. The second analysis engine is configured to (i) receive results of the analysis of the object from the first analysis engine and (ii) analyze, based at least in part on the analysis by the first analysis engine, whether the object is malicious in accordance with a predictive model. Responsive to the first analysis engine and the second analysis engine differing in determinations as to whether the object is malicious, information associated with an analysis of the object by at least one of the first analysis engine and the second analysis engine is uploaded for determining whether an update of the predictive model is to occur. An update of the predictive model is subsequently received by the classification engine.
    Type: Grant
    Filed: June 26, 2017
    Date of Patent: July 30, 2019
    Assignee: FireEye, Inc.
    Inventors: Abhishek Singh, Ali Mesdaq, Anirban Das, Varun Jain
  • Patent number: 9690933
    Abstract: According to one embodiment, an apparatus comprises a detection engine and a classification engine. The detection engine is responsible for analyzing an object to determine if the object is malicious. The classification engine is configured to (i) receive results of the analysis of the object conducted by the detection engine and (ii) analyze, based at least in part on the results from the detection engine, whether the object is malicious in accordance with a predictive model. Responsive to the detection engine and the classification engine differing in determinations as to whether the object is malicious, information associated with at least a portion of the results of the analysis of the object by at least one of the detection engine and the classification engine is uploaded for determining whether an update of the predictive model is to occur. An update of the predictive model is subsequently received by the classification engine.
    Type: Grant
    Filed: December 22, 2014
    Date of Patent: June 27, 2017
    Assignee: FireEye, Inc.
    Inventors: Abhishek Singh, Ali Mesdaq, Anirban Das, Varun Jain
  • Publication number: 20130028419
    Abstract: The present invention relates to a system and a method for secured transmission/and storage of encrypted data in all the applicable modes of data storage. The method comprises the steps of providing the data, generating a password or a key by a user, encrypting the data by the password or the key for plural number of times resulting plurality of cipher texts, sending plurality of the cipher texts and the password or key, and decrypting the cipher text by the password or the key. The system comprises input device means for providing the data, input device means for generating a password by a user, processor means encrypting the data by the password or key for plural number of times resulting plurality of cipher texts, means for sending the plurality of cipher texts and the password and means for decrypting the cipher text by the password or key.
    Type: Application
    Filed: July 24, 2012
    Publication date: January 31, 2013
    Inventors: Debabrata Das, Anirban Das, Debjani Das, Prasanta Bhattacharjee
  • Publication number: 20090134015
    Abstract: A method of manufacturing a magnetic recording medium, including the step of reactively or non-reactively sputtering at least a first data storing thin film layer over a substrate from a sputter target. The sputter target is comprised of cobalt (Co), platinum (Pt), a first metal oxide further comprised of a first metal and oxygen (O) and, when non-reactively sputtering, a second metal oxide. The first data storing thin film layer is comprised of cobalt (Co), platinum (Pt), and a stoichiometric third metal oxide comprising the first metal and oxygen (O). During sputtering, any non-stoichiometry of the third metal oxide in the first data storing thin film layer is compensated for using oxygen (O) from the second metal oxide in the sputter target, or using oxygen (O) from the oxygen-rich gas atmosphere.
    Type: Application
    Filed: February 4, 2009
    Publication date: May 28, 2009
    Applicant: HERAEUS INC.
    Inventors: Michael Gene RACINE, Anirban Das, Steven Roger Kennedy, Yuanda R. Cheng
  • Publication number: 20080268292
    Abstract: A magnetic recording medium is provided, comprising a substrate, a hexagonal close-packed seedlayer deposited over the substrate, a hexagonal close-packed underlayer deposited over the seedlayer, and a hexagonal close-packed recording layer deposited over the underlayer. The seedlayer is comprised of a ceramic. A method of manufacturing a magnetic recording medium is also provided, comprising the steps of sputtering a first sputter target to deposit a hexagonal close-packed seedlayer over a substrate, sputtering a second sputter target to deposit a hexagonal close-packed underlayer over the seedlayer, and sputtering a third sputter target to deposit a hexagonal close-packed magnetic recording layer over the underlayer. The seedlayer comprises a ceramic.
    Type: Application
    Filed: April 26, 2007
    Publication date: October 30, 2008
    Applicant: HERAEUS, INC.
    Inventors: Anirban Das, Michael Gene Racine, Makoto Imakawa
  • Publication number: 20080238601
    Abstract: An inductive device is provided, comprising a conductor configured in a spiral and a first layer of granular magnetic material having a plurality of magnetic grains embedded in an amorphous ceramic matrix. The amorphous ceramic matrix has a dielectric constant greater than 3. A transformer is also provided, comprising a core and a first inductor. The first inductor includes a first conductor configured in a spiral surrounding a first portion of the core, and a first layer of granular magnetic material. The transformer further comprises a second inductor. The second inductor includes a second conductor configured in a spiral surrounding a second portion of the core, and a second layer of granular magnetic material. The first and second layers of granular magnetic material have a plurality of magnetic grains embedded in an amorphous ceramic matrix. The amorphous ceramic matrix has a dielectric constant greater than 3.
    Type: Application
    Filed: July 11, 2007
    Publication date: October 2, 2008
    Applicant: HERAEUS INC.
    Inventors: Anirban Das, ShinHwa Li, Michael Gene Racine
  • Publication number: 20080210555
    Abstract: A method of manufacturing sputtering targets from powder materials, comprising steps of: providing at least one raw powder material; forming the at least one raw powder material into a green body with density greater than about 40 % of theoretical maximum density; treating the green body with microwaves to form a sintered body with density greater than about 97% of theoretical maximum density; and forming a sputtering target from the sintered body. The methodology is especially useful in the fabrication of targets comprising dielectric and cermet materials.
    Type: Application
    Filed: December 4, 2007
    Publication date: September 4, 2008
    Applicant: HERAEUS INC.
    Inventors: Fenglin Yang, Anirban Das, Carl Derrington, Bernd Kunkel
  • Publication number: 20080170959
    Abstract: A sputter target is provided with a first elemental phase of a first material, the first material being either cobalt or tungsten, a first intermetallic phase including the first material and a second material, the second material being either tungsten or cobalt and different from the first material, the first material in a greater atomic percentage than the second material, and a second intermetallic phase including the second material and the first material, the second material in a greater atomic percentage than the first material. The sputter target includes 20-80 at. % cobalt, and has a density greater than 99% of a theoretical maximum density thereof. The sputter target is fabricated by selecting a cobalt powder and a tungsten powder having the same particle size distribution, blending the cobalt powder and the tungsten powder to form a blended powder, canning the blended powder, hot pressing the blended powder to form a solid, and machining the solid to form a sputter target.
    Type: Application
    Filed: January 11, 2007
    Publication date: July 17, 2008
    Applicant: Heraeus Incorporated
    Inventors: Fenglin Yang, Bernd Kunkel, Steven Roger Kennedy, Anirban Das
  • Publication number: 20080166596
    Abstract: A Re-based alloy material comprises >50 at. % Re and at least one alloying material selected from grain size refinement elements X which have an atomic radius larger or smaller than that of Re and a solid solubility <˜6 at. % in hcp Re at room or higher temperatures, and lattice matching elements Y which have an atomic radius larger or smaller than that of Re and form a solid solution in hcp Re at room or higher temperatures. The alloy material may further comprise at least one material selected from the group consisting of oxides, nitrides, and carbides. Targets comprising the Re-based alloy material are useful in sputter deposition of improved interlayers for obtaining optimally structured granular perpendicular magnetic recording layers.
    Type: Application
    Filed: October 23, 2007
    Publication date: July 10, 2008
    Applicant: HERAEUS INC.
    Inventors: Anirban DAS, Michael Gene Racine, Makoto Imakawa, Steven Roger Kennedy, Rikhit Arora
  • Publication number: 20080131735
    Abstract: The various embodiments of the present invention generally relate to the deposition of a seedlayer for a magnetic recording medium used for perpendicular magnetic recording (PMR) applications, where the seedlayer provides for grain size refinement and reduced lattice mis-fit for a subsequently deposited underlayer or granular magnetic layer, and where the seedlayer is deposited using a nickel (Ni) alloy based sputter target. The nickel (Ni) alloy can be binary (Ni—X; Ni—Y) or ternary (Ni—X—Y). In addition, the binary (Ni—X; Ni—Y) or ternary (Ni—X—Y) nickel (Ni) based alloys can be further alloyed with metal oxides, thus forming seedlayer thin films with a granular microstructure containing metallic grains, surrounded by an oxygen rich grain boundary. The nickel-based alloys (with or without metal oxides) of the various exemplary embodiments can be made by powder metallurgical technique or by melt-casting techniques, with or without thermo-mechanical working.
    Type: Application
    Filed: December 5, 2006
    Publication date: June 5, 2008
    Applicant: Heraeus Incorporated
    Inventors: Anirban Das, Steven Roger Kennedy, Michael Gene Racine
  • Publication number: 20080057350
    Abstract: A magnetic data storage layer includes a high-Ku alloy and an oxide compound of oxygen and either a single element or an alloy. Because of their high Ku, the magnetic domains of this magnetic data storage layer can be made significantly smaller, while maintaining an acceptable thermal stability ratio of about 50 to 70, to provide areal densities of greater than 200 Gb/in2. Sputter targets for sputtering such a magnetic data storage layer are also provided. The sputter targets include the high-Ku alloy and either the desired oxide compounds, or the elements to be oxidized in a reactive sputtering process. The high-Ku alloy has an anisotropy constant of at least 0.5×107 ergs/cm3.
    Type: Application
    Filed: September 1, 2006
    Publication date: March 6, 2008
    Applicant: Heraeus, Inc.
    Inventors: Anirban Das, Michael Gene Racine, Steven Roger Kennedy
  • Publication number: 20080026255
    Abstract: A magnetic recording medium for heat-assisted magnetic recording includes a magnetic data storage layer having magnetic grains separated by grain boundary phases. The grain boundary phases have a higher thermal conductivity than a thermal conductivity of the magnetic grains. The magnetic recording medium further includes a heat sink layer and one or more intermediate layers disposed between the magnetic data storage layer and the heat sink layer. Each of the one or more intermediate layers has crystalline phase grains separated by grain boundary phases. The grain boundary phases have a higher thermal conductivity than a thermal conductivity of the crystalline phase grains. The grain boundary phases in both the magnetic data storage layer and the intermediate layers provide high thermal conductivity conduits for dissipating heat from the magnetic data storage layer to the heatsink layer.
    Type: Application
    Filed: November 22, 2006
    Publication date: January 31, 2008
    Applicant: Heraeus, Inc.
    Inventors: Anirban Das, Michael G. Racine
  • Publication number: 20070253103
    Abstract: A magnetic recording medium that includes a substrate, an underlayer deposited above the substrate, the underlayer comprised of a magnetically soft alloy containing at least one soft ferromagnetic element and at least one corrosion inhibitor element that is selected from the group consisting of chromium (Cr), tungsten (W), molybdenum (Mo), carbon (C), copper (Cu), nickel (Ni), manganese (Mn), nitrogen (N), titanium (Ti), niobium (Nb), silicon (Si), tantalum (Ta), and aluminum (Al), and a magnetic data recording layer deposited above the underlayer. A sputter target comprised of the magnetically soft alloy is also provided, and the magnetically soft alloy is also used in soft magnetic layers on magnetic recording heads.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 1, 2007
    Applicant: Heraeus, Inc.
    Inventors: Michael Racine, Anirban Das, Steven Kennedy
  • Publication number: 20070190364
    Abstract: A magnetic recording medium having an underlayer comprised of ruthenium (Ru) and an alloying element is provided. The alloying element may be for refining grain size, when it has little or no solid solubility in HCP phase Ru and is present in an amount in excess of that solubility. The alloying element may be for reducing lattice misfit, where it has some solid solubility in HCP phase Ru and is present in an amount not exceeding that solubility. The alloying element may be for both refining grain size and reducing lattice misfit, where it has some solid solubility in HCP phase Ru and is present in an amount in excess of that solubility. The underlayer may alternately include ruthenium and two alloying elements, one for refining grain size, the other for reducing lattice misfit. A sputter target comprising ruthenium and an alloying element is also provided.
    Type: Application
    Filed: February 14, 2006
    Publication date: August 16, 2007
    Inventors: Anirban Das, Michael Racine