Patents by Inventor Alexander Krichevsky

Alexander Krichevsky 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: 9506075
    Abstract: In one aspect, the invention relates to a transgenic bioluminescent plant including an expressible heterologous nucleotide sequence comprising a bacterial LUX operon, which includes LUX A, LUX B, LUX C, LUX D, LUX E, and LUX G genes, wherein the heterologous nucleotide sequence is expressed to render the plant bioluminescent.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: November 29, 2016
    Assignee: BioGlow, LLC
    Inventor: Alexander Krichevsky
  • Patent number: 9484051
    Abstract: A heat-assisted magnetic recording (HAMR) write apparatus is coupled with a laser that provides energy. The HAMR write apparatus includes a pole, at least one coil, a waveguide, a near-field transducer (NFT) and at least one antireflective mechanism. The pole writes to a region of the media and includes a media-facing surface. The coil(s) energize the pole. The waveguide is optically coupled with the laser and includes a core and cladding. The waveguide is for directing a portion of the energy toward the NFT, which is located in a transmission direction from the core of the waveguide. The antireflective mechanism(s) are in at least one of a first position in the waveguide, a second position in the NFT and a third position between the waveguide and the NFT.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 1, 2016
    Assignees: THE PROVOST, FELLOWS, FOUNDATION SCHOLARS AND THE OTHER MEMBERS OF BOARD, OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH NEAR DUBLIN, WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Alexander Krichevsky, Christopher B. Wolf, Frank D. Bello, Kyle E. Ballantine, John Donegan, David Michael Owen McCloskey
  • Patent number: 9284569
    Abstract: Real-time monitoring of plant or environmental conditions is solved by Autoluminescent Phytosensor Plants (ALPS) disclosed herein that emit light in response to a specified stimulus or condition, which light emission is detected or measured by a sensor.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: March 15, 2016
    Assignee: Bioglow, LLC
    Inventor: Alexander Krichevsky
  • Patent number: 9111558
    Abstract: A focusing structure including an array of localized optical alterations that alter the propagation of light through the waveguide to diffractively focus the light as it exits the focusing structure. The array of optical alterations may be formed along either a straight or a curved line within a cross section of the focusing structure. In energy assisted magnetic recording apparatus a laser beam propagates through the waveguide to a near field transducer. The waveguide comprises a focusing element that includes an array of localized optical alterations that alter the propagation of the laser beam through the waveguide to diffractively focus the laser beam approximately at the near field transducer.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 18, 2015
    Assignees: Western Digital (Fremont), LLC, The Provost, Fellows, Foundation Scholars and the other members of Board, of the College of the Holy and Undivided Trinity of Queen Elizabeth near Dublin
    Inventors: Alexander Krichevsky, David Michael Owen McCloskey, Frank D. Bello, Christopher B. Wolf
  • Patent number: 9099103
    Abstract: A method, system and apparatus are described for increasing areal density and track density for a data storage system. Media with high magneto-crystalline anisotropy is heated locally during writing, utilizing heating methods such as heat-assisted magnetic recording, energy assisted magnetic recording, thermally assisted recording. In an aspect, high-power heated tracks of a magnetic recording layer are heated and written, and then low-power heated tracks are heated and written. The high-power heated tracks and the low-power heated tracks are interlaced, such that a low-power heated track is situated between two high-power heated tracks. In an aspect, media rewriting speed is increased. In an aspect, the high-power heated tracks and low-power heated tracks are written to at substantially the same data rate and linear density. In an aspect, any erasure of any portion of the high-power heated tracks from heating the low-power heated tracks is avoided, or minimized.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: August 4, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventor: Alexander Krichevsky
  • Patent number: 9074941
    Abstract: Systems and methods for measuring ambient and laser temperature in heat assisted magnetic recording (HAMR) systems are provided. One such system includes a slider having a write head, a laser diode coupled to the slider and configured to direct energy to a magnetic medium, and a preamplifier circuit including a voltage measurement circuit configured to measure a voltage drop across the laser diode, and a current measurement circuit configured to measure a current through the laser diode, where the preamplifier circuit is configured to store calibration information including a plurality of temperatures corresponding with measurements of the voltage drop across the laser diode and measurements of the current through the laser diode, and calculate a temperature based on the measured voltage drop across the laser diode, the measured current through the laser diode, and the calibration information.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 7, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Robert J. Johnson
  • Patent number: 9064528
    Abstract: A heat-assisted magnetic recording (HAMR) head is coupled with a laser for providing energy and has an air-bearing surface (ABS) configured to reside in proximity to a media during use. The HAMR head includes a slider coupled with the laser and a HAMR transducer coupled with the slider. The HAMR transducer includes a write pole that writes to a region of the media, coil(s) for energizing the write pole and an interferometric waveguide (IWG) optically coupled with the laser. The IWG includes a splitter, a recombination region and arms between the splitter and the recombination region. The arms have multiple optical path lengths. The IWG is configured to provide the energy from the laser to the media by forming an interference pattern in the recombination region. An antinode of the interference pattern is at a region of the media and heats the region of the media for a write operation.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: June 23, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Christopher B. Wolf
  • Patent number: 9064525
    Abstract: A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
    Type: Grant
    Filed: November 26, 2013
    Date of Patent: June 23, 2015
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Robert J. Johnson
  • Publication number: 20150146506
    Abstract: A disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk. At least one transmission line couples a laser driver to the laser. Data is written to the disk by pulsing the laser driver, wherein the transmission line comprises an impedance that results in a target pulse shape of optical power output by the laser.
    Type: Application
    Filed: November 26, 2013
    Publication date: May 28, 2015
    Applicant: Western Digital Technologies, Inc.
    Inventors: ALEXANDER KRICHEVSKY, ROBERT J. JOHNSON
  • Patent number: 8908480
    Abstract: A method and system provide an energy assisted magnetic recording (EAMR) disk drive. The EAMR disk drive includes a media, at least one laser coupled with the slider, at least one EAMR head on the slider, and at least one electro-optical modulator (EAM) The EAM(s) are optically coupled with the laser(s) and coupled with the slider. The combination of the laser(s) and EAM(s) provide a pulsed energy output. The EAMR head(s) include at least one waveguide, a write pole, and at least one coil for energizing the write pole. The waveguide(s) receive the pulsed energy output and direct the pulsed energy output toward the media.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: December 9, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventor: Alexander Krichevsky
  • Patent number: 8891341
    Abstract: A method and system provide a heat assisted magnetic recording (HAMR) disk drive including a media. The HAMR disk drive also includes a slider, at least one laser, at least one HAMR head on the slider and at least one electro-optical modulator (EOM) optically coupled with the laser(s) and coupled with the slider. The at least one laser and the at least one EOM are coupled to provide a modulated energy output. The at least one EOM controls the modulated energy output to have a characteristic waveform shape. The at least one HAMR head includes at least one waveguide, a write pole, and at least one coil for energizing the write pole. The at least one waveguide receives the modulated energy output and directs the modulated energy output toward the media.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: November 18, 2014
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Michael L. Mallary, Fenghua Zong
  • Publication number: 20140273224
    Abstract: The present invention relates to artificial nucleotide sequences, including specific mutations therein.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Applicant: BIOGLOW INC.
    Inventor: Alexander Krichevsky
  • Patent number: 8747835
    Abstract: The present invention relates to artificial nucleotide sequences, including specific mutations therein.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: June 10, 2014
    Assignee: BioGlow, LLC
    Inventor: Alexander Krichevsky
  • Patent number: 8675455
    Abstract: Systems and methods for controlling light phase difference in interferometric waveguides at near field transducers by selectively heating the light source are provided. One such system for controlling light phase at the NFT of an interferometric waveguide includes a laser, a heater configured to heat the laser, a splitter configured to receive light from the laser and to split the light into a first waveguide arm and a second waveguide arm, the first waveguide arm and the second waveguide arm converging at a junction about opposite the splitter, and the NFT proximate the junction and configured to receive the light, where the first waveguide arm is longer than the second waveguide arm by a preselected distance, and where the heater is configured to generate and maintain a preselected phase difference in the light arriving at the NFT via the first waveguide arm and the second waveguide arm.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: March 18, 2014
    Assignee: Western Digital (Fremont), LLC
    Inventors: Alexander Krichevsky, Sergei Sochava, Michael L. Mallary
  • Publication number: 20140059722
    Abstract: Real-time monitoring of plant or environmental conditions is solved by Autoluminescent Phytosensor Plants (ALPS) disclosed herein that emit light in response to a specified stimulus or condition, which light emission is detected or measured by a sensor.
    Type: Application
    Filed: May 14, 2013
    Publication date: February 27, 2014
    Applicant: Bioglow LLC
    Inventor: Alexander Krichevsky
  • Patent number: 8619508
    Abstract: A disk drive is disclosed comprising a head actuated over a disk, wherein the head comprises a laser operable to heat the disk while writing data to the disk, and a fly height actuator (FHA) operable to adjust a fly height of the head over the disk. When a write command is received to write data to a target data track, the head is positioned over the target data track. When the head approaches a target data sector of the target data track, a power applied to the FHA is increased to decrease the fly height of the head. When the head reaches the target data sector, a power applied to the laser is increased to heat the disk, and the power applied to the FHA is decreased substantially monotonically while writing data to the target data sector.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: December 31, 2013
    Assignee: Western Digital Technologies, Inc.
    Inventors: Alexander Krichevsky, Davide Guarisco
  • Publication number: 20130074221
    Abstract: In one aspect, the invention relates to a transgenic autoluminescent plant including an expressible heterologous nucleotide sequence comprising a bacterial LUX operon, which includes LUX A. LUX B. LUX C. LUX D. LUX b. And LUX G genes, wherein the heterologous nucleotide sequence is expressed to render the plant autonomously luminescent.
    Type: Application
    Filed: February 25, 2010
    Publication date: March 21, 2013
    Applicant: BIOGLOW, L.L.C.
    Inventor: Alexander Krichevsky
  • Publication number: 20110075288
    Abstract: A novel magnetic recording medium is disclosed in which a plurality of magnetic data recording layers and navigation layers are separate from one another. By decoupling the navigation and data layers, data may be written to data layers without the need to align the written data along servo tracks. Thus, the data layers may be configured for high recording density. Beneficially, imperfections within the magnetic data layers may also be compensated for by the use of adaptive error correction schemes which vary the encoding/decoding of data during writing/reading based upon the local quality of the recording media.
    Type: Application
    Filed: May 29, 2009
    Publication date: March 31, 2011
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Alexander Krichevsky, Sakhrat Khizroev, Ilya Isaakovich Dumer, Andrey Alekseyevich Lavrenov, Nissim Amos
  • Publication number: 20100192262
    Abstract: In one aspect, the invention relates to a transgenic bioluminescent plant including an expressible heterologous nucleotide sequence comprising a bacterial LUX operon, which includes LUX A, LUX B, LUX C, LUX D, LUX E, and LUX G genes, wherein the heterologous nucleotide sequence is expressed to render the plant bioluminescent.
    Type: Application
    Filed: July 31, 2008
    Publication date: July 29, 2010
    Applicant: BIOGLOW INC.
    Inventor: Alexander Krichevsky
  • Patent number: 7232891
    Abstract: The subject invention provides a method for detecting the presence of human malignant cells in a sample of tumor cells, which comprises contacting the sample with an antibody directed to an epitope present on the ? subunit of human luteinizing hormone or on intact human luteinizing hormone under conditions such that the antibody forms a complex with cells present in the sample if the epitope is present on the surface of the cells, and determining whether the antibody forms such a complex. The subject invention also provides a method for determining whether a tumor present in a human subject is malignant which comprises obtaining a sample of cells from the tumor and detecting the presence of malignant cells in the sample according to the method of the subject invention.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 19, 2007
    Assignees: The Trustees of Columbia University in the city of New York, Allegheny-Singer Research Institute
    Inventors: Hernan Acevedo, Alexander Krichevsky