Patents by Inventor Shravan BHARADWAJ

Shravan BHARADWAJ 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: 10273600
    Abstract: An electronic device may include intertwined strands of material such as strands forming fabric. A strand in the fabric may include a light-emitting core surrounded by a coaxial light modulator layer. The light-emitting core may be formed from an optical fiber, light-emitting diodes mounted to a polymer core, or a layer of light-emitting diodes sandwiched between coaxial inner and outer conductive layers. The light modulator layer may have coaxial transparent inner and outer electrodes and may have a light modulating material such as electrochromic material, liquid crystal material, or other material that exhibits optical properties such as color and/or light transmission that can be electrically controlled.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: April 30, 2019
    Assignee: Apple Inc.
    Inventor: Shravan Bharadwaj
  • Patent number: 10234960
    Abstract: An electronic device can include a key and/or a keyboard system. In one embodiment, magneto-rheological materials are employed to provide a variable response keyboard of an electronic device.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: March 19, 2019
    Assignee: APPLE INC.
    Inventor: Shravan Bharadwaj
  • Publication number: 20190029136
    Abstract: A housing made from a circuit laminate includes first and second layers coupled together. Each includes a rigid, electrically insulating non-planar structural layer, flexible conductive traces disposed on surfaces of the structural layer, and flexible connector layers contacting to the flexible conductive traces. The housing may be formed from the circuit laminate using thermoforming or another process that co-molds the first and second layers. The structural layers stiffen the housing and/or form an environmental or other barrier so that the housing protects an internal component.
    Type: Application
    Filed: July 20, 2017
    Publication date: January 24, 2019
    Inventor: Shravan Bharadwaj
  • Publication number: 20180350491
    Abstract: A multipole permanent magnet may be provided with a magnetic-field shunt. The multipole permanent magnet may be formed from compression-molded magnetic particles such as magnetically anisotropic rare-earth particles in an elastomeric polymer. The magnetic-field shunt may be formed from magnetic members in a polymer binder that are separated by gaps to allow the shunt to flex or from magnetic particles in a polymer binder. The magnetic particles in the polymer binder may be ferrite particles or other magnetic particles. The polymer binder may be formed from an elastomeric material and may be integral with the elastomeric polymer of the multipole permanent magnet or separated from the elastomeric polymer of the multipole permanent magnet by a polymer separator layer. Conductive particles may be formed in polymer such as the elastomeric polymer with the magnetic particles. The conductive particles may be configured to form electrical connector contacts and other signal paths.
    Type: Application
    Filed: March 19, 2018
    Publication date: December 6, 2018
    Inventors: Shravan Bharadwaj, David S. Herman, Rafael L. Dionello
  • Patent number: 9922759
    Abstract: A unibody magnetic structure having layers of variably magnetized material is disclosed. The unibody magnetic structure can be formed by way of additive manufacturing, such as by a stereolithographic (SLA) process or a selective laser sintering (SLS) process. The SLA process can involve forming the structure from a molten pool of polymer material, with the material having a magnetic component dissolved therein. The SLS process can involve sintering the structure from a powder having a magnetic component. As each layer is formed, the layer can be selectively magnetized with a given polarity and strength. The magnetization of each formed layer can vary, such that the final structure comprises numerous layers having different shapes and sizes, as well as different levels and polarities of magnetization.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: March 20, 2018
    Assignee: Apple Inc.
    Inventor: Shravan Bharadwaj
  • Patent number: 9855637
    Abstract: A method and system for observing and monitoring thermal characteristics of a machining operation, such as a surface finishing operation, performed on a workpiece is disclosed. The surface finishing operation can be performed on the workpiece in order to remove a surface defect, e.g. a parting line, on a surface of the workpiece and/or to provide a mirror-like finish to the workpiece. In one embodiment, an emissive layer is applied to the workpiece to increase a thermal emissivity of the workpiece. In some embodiments, a finishing surface, such as a polishing or buffing wheel, and/or a lubricant used in a finishing operation is monitored. A thermal profile of the surface of the workpiece, finishing surface and/or lubricant can be obtained. The finishing operation can be modified in response to the monitored thermal characteristics to prevent the occurrence of defects and improve the efficacy of the finishing operation.
    Type: Grant
    Filed: March 4, 2015
    Date of Patent: January 2, 2018
    Assignee: Apple Inc.
    Inventors: Lucas Allen Whipple, Simon Regis Louis Lancaster-Larocque, Collin D. Chan, Christopher R. Fagan, Vincent Yan, Ian S. Theilacker, Brian K. Miehm, Shravan Bharadwaj
  • Publication number: 20170092400
    Abstract: A unibody magnetic structure having layers of variably magnetized material is disclosed. The unibody magnetic structure can be formed by way of additive manufacturing, such as by a stereolithographic (SLA) process or a selective laser sintering (SLS) process. The SLA process can involve forming the structure from a molten pool of polymer material, with the material having a magnetic component dissolved therein. The SLS process can involve sintering the structure from a powder having a magnetic component. As each layer is formed, the layer can be selectively magnetized with a given polarity and strength. The magnetization of each formed layer can vary, such that the final structure comprises numerous layers having different shapes and sizes, as well as different levels and polarities of magnetization.
    Type: Application
    Filed: August 25, 2016
    Publication date: March 30, 2017
    Inventor: Shravan BHARADWAJ
  • Publication number: 20150290764
    Abstract: A method and system for observing and monitoring thermal characteristics of a machining operation, such as a surface finishing operation, performed on a workpiece is disclosed. The surface finishing operation can be performed on the workpiece in order to remove a surface defect, e.g. a parting line, on a surface of the workpiece and/or to provide a mirror-like finish to the workpiece. In one embodiment, an emissive layer is applied to the workpiece to increase a thermal emissivity of the workpiece. In some embodiments, a finishing surface, such as a polishing or buffing wheel, and/or a lubricant used in a finishing operation is monitored. A thermal profile of the surface of the workpiece, finishing surface and/or lubricant can be obtained. The finishing operation can be modified in response to the monitored thermal characteristics to prevent the occurrence of defects and improve the efficacy of the finishing operation.
    Type: Application
    Filed: March 4, 2015
    Publication date: October 15, 2015
    Inventors: Lucas Allen Whipple, Simon Regis Louis Lancaster-Larocque, Collin D. Chan, Christopher R. Fagan, Vincent Yan, IAN S. THEILACKER, Brian K. Miehm, Shravan Bharadwaj
  • Patent number: 9044839
    Abstract: The described embodiment relates generally to the development of a finishing process for a device housing. The device housing can be formed of a thermoplastic, or a metal such as aluminum or stainless steel. A method and an apparatus are described for accurately measuring the amount of material removed during a finishing process. More particularly embodiments described within this application disclose a method of accurately measuring material removal during a finishing process across a curved or spline shaped surface by drilling an array of pockets along a surface of the device housing, where the drilled pockets can be used to measure material removal rates with a high degree of accuracy.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: June 2, 2015
    Assignee: APPLE INC.
    Inventor: Shravan Bharadwaj
  • Patent number: 8959740
    Abstract: Systems which may be employed to adjust the shape of a computer housing are provided. The systems may include a measurement apparatus that measures the positions of points on the housing. A determining apparatus may determine an offset between the position of the points and reference values. An adjustment apparatus may apply force to the computer housing with actuators based on the offset at each of the points. This process may be repeated or otherwise continued until the offset is within a predetermined range of acceptable values. Related methods, assemblies, and a non-transitory computer readable medium are also provided.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: February 24, 2015
    Inventors: Shravan Bharadwaj, Derrick Tek-Kien Jue
  • Publication number: 20140087628
    Abstract: The described embodiment relates generally to the development of a finishing process for a device housing. The device housing can be formed of a thermoplastic, or a metal such as aluminum or stainless steel. A method and an apparatus are described for accurately measuring the amount of material removed during a finishing process. More particularly embodiments described within this application disclose a method of accurately measuring material removal during a finishing process across a curved or spline shaped surface by drilling an array of pockets along a surface of the device housing, where the drilled pockets can be used to measure material removal rates with a high degree of accuracy.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 27, 2014
    Applicant: Apple Inc.
    Inventor: Shravan BHARADWAJ
  • Publication number: 20130274931
    Abstract: Systems which may be employed to adjust the shape of computer housing are provided. The systems may include a measurement apparatus that measures the positions of points on the housing. A determining apparatus may determine an offset between the position of the points and reference values. An adjustment apparatus may apply a laser to the computer housing having parameters based on the offset at each of the points. The adjustment apparatus can rely upon a laser beam that impinges on the surface of the computer housing causing a shock wave that, in turn, creates a force that elastically deforms the computer housing. This process may be repeated or otherwise continued until the offset is within a predetermined range of acceptable values.
    Type: Application
    Filed: September 19, 2012
    Publication date: October 17, 2013
    Applicant: APPLE INC.
    Inventors: Shravan BHARADWAJ, David I. MORGENSTERN
  • Patent number: 8556156
    Abstract: A method for friction stir welding is provided. The method may include beginning a friction stir welding operation by directing a rotating friction stir welding tool along a joint between two parts. A temperature of the resulting weld may be measured. Thereby, a controller may adjust process parameters associated with the friction stir welding process to decrease a difference between desired and measured temperatures of the weld. The desired temperature may correspond to a temperature at which the parts are plasticized. The process parameters may include rotational speed of the friction stir welding tool, feed rate, axial force along the length of the friction stir welding tool, and tilt angle of the friction stir welding tool.
    Type: Grant
    Filed: August 30, 2012
    Date of Patent: October 15, 2013
    Assignee: Apple Inc.
    Inventor: Shravan Bharadwaj
  • Publication number: 20130133167
    Abstract: Systems which may be employed to adjust the shape of a computer housing are provided. The systems may include a measurement apparatus that measures the positions of points on the housing. A determining apparatus may determine an offset between the position of the points and reference values. An adjustment apparatus may apply force to the computer housing with actuators based on the offset at each of the points. This process may be repeated or otherwise continued until the offset is within a predetermined range of acceptable values. Related methods, assemblies, and a non-transitory computer readable medium are also provided.
    Type: Application
    Filed: August 28, 2012
    Publication date: May 30, 2013
    Applicant: Apple Inc.
    Inventors: Shravan BHARADWAJ, Derrick Tek-Kien JUE