Patents by Inventor Daniel Cheng

Daniel Cheng 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: 9844169
    Abstract: A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: December 12, 2017
    Assignee: The Johns Hopkins University
    Inventors: Daniel E. Matlin, Sheng Cheng, Seppo J. Lehtonen, John E. Penn, Perry M. Malouf, Matthew P. Angert, Christopher B. Haskins, Avinash Sharma, Jacob P. Treadway, Robert E. Wallis
  • Patent number: 9537925
    Abstract: A non-transitory computer-readable storage medium may comprise instructions stored thereon that, when executed by at least one processor, are configured to cause an intermediary server to at least receive, from a first client device, a first login request via a first browser installed on the first client device, the first login request identifying a user account, receive, from a third-party server, a message request, the message request including an identifier and indicating a browser application or a browser extension, map the identifier to the user account, determine whether the user account has installed the browser application or browser extension, and if the user account has installed the browser application or browser extension, send a first message to the first browser based on the message request.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: January 3, 2017
    Assignee: GOOGLE INC.
    Inventors: Peter H. Williamson, Daniel Cheng, Somas Thyagaraja, Justin DeWitt, Munjal Doshi, Dmitry Titov, Jennifer Braithwaite, Xiaoyong Liu
  • Publication number: 20150256415
    Abstract: A non-transitory computer-readable storage medium may comprise instructions stored thereon that, when executed by at least one processor, are configured to cause an intermediary server to at least receive, from a first client device, a first login request via a first browser installed on the first client device, the first login request identifying a user account, receive, from a third-party server, a message request, the message request including an identifier and indicating a browser application or a browser extension, map the identifier to the user account, determine whether the user account has installed the browser application or browser extension, and if the user account has installed the browser application or browser extension, send a first message to the first browser based on the message request.
    Type: Application
    Filed: July 9, 2013
    Publication date: September 10, 2015
    Inventors: Peter Hunt Williamson, Daniel Cheng, Somas Thyagaraja, Justin DeWitt, Munjal Doshi, Dmitry Titov, Jennifer Wai-Fung Braithwaite, Kevin Liu
  • Patent number: 9034174
    Abstract: The present invention provides a method of preparing an iron oxide magnetic nanoparticle, comprising the steps of: i) reacting a water-soluble ferrous salt with a water-soluble ferric salt in a mole ratio of 1:2 in the presence of a base and a citrate to give an iron oxide particle surface-coated with the citrate (c-MNP); ii) reacting the c-MNP obtained in step (i) with a thiophilic compound to give a thiophilic compound-bounded iron oxide particle surface-coated with the citrate (thiophilic-c-MNP); and iii) modifying the thiophilic-c-MNP obtained in step (ii) using a surfactant for phase transfer of the thiophilic-c-MNP from aqueous phase to organic phase. The present invention also relates to the iron oxide magnetic nanoparticle prepared by the above-mentioned method and the use of the nanoparticle in desulfurization. The iron oxide magnetic nanoparticle of the present invention is capable of effective deep desulfurization.
    Type: Grant
    Filed: November 8, 2012
    Date of Patent: May 19, 2015
    Assignee: NANOPETRO COMPANY LIMITED
    Inventor: Man Chung Daniel Cheng
  • Patent number: 8898915
    Abstract: A twin-beam laser module has a housing having a first cylindrical space and a second cylindrical space, which are adjacent and parallel in axial direction to each other. A first laser assembly is directly secured inside the first cylindrical space to output a first laser beam, and an outer cylindrical casing is positioned inside the second cylindrical space. A second laser assembly is provided inside the outer cylindrical casing to output a second laser beam, and an adjustment apparatus adjusts the orientation of the outer cylindrical casing so as to align the first laser beam and the second laser beam to be parallel to each other.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: December 2, 2014
    Assignee: Quarton, Inc
    Inventor: Daniel Cheng
  • Patent number: 8823345
    Abstract: This invention uses new switching regulator structures to split single magnetic loops into multiple magnetic loops, with linked opposing magnetic fields, to cause a cancelling effect, resulting in a much lower overall magnetic field. This results in lower EMI. In one embodiment, synchronously switched transistors are divided up into parallel topside transistors and parallel bottomside transistors. The topside transistors are positioned to oppose the bottomside transistors, and bypass capacitors are connected between the pairs to create a plurality of current loops. The components are arranged to form a mirror image of the various current loops so that the resulting magnetic fields are in opposite directions and substantially cancel each other out. Creating opposite current loops may also be achieved by forming the conductors and components in a figure 8 pattern with a cross-over point.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: September 2, 2014
    Assignee: Linear Technology Corporation
    Inventors: Leonard Shtargot, Daniel Cheng, John Gardner, Jeffrey Witt, Christian Kueck
  • Publication number: 20140111174
    Abstract: This invention uses new switching regulator structures to split single magnetic loops into multiple magnetic loops, with linked opposing magnetic fields, to cause a cancelling effect, resulting in a much lower overall magnetic field. This results in lower EMI. In one embodiment, synchronously switched transistors are divided up into parallel topside transistors and parallel bottomside transistors. The topside transistors are positioned to oppose the bottomside transistors, and bypass capacitors are connected between the pairs to create a plurality of current loops. The components are arranged to form a mirror image of the various current loops so that the resulting magnetic fields are in opposite directions and substantially cancel each other out. Creating opposite current loops may also be achieved by forming the conductors and components in a FIG. 8 pattern with a cross-over point.
    Type: Application
    Filed: December 10, 2012
    Publication date: April 24, 2014
    Applicant: Linear Technology Corporation
    Inventors: Leonard Shtargot, Daniel Cheng, John Gardner, Jeffrey Witt, Christian Kueck
  • Publication number: 20130268837
    Abstract: A method for managing information displayed on a computing device includes automatically creating, using an application executed by a processor of the computing device, an interactive content display panel, wherein the interactive content display panel includes a graphical user interface element associated with HTML content. The interactive content display panel is displayed in front of all other windows displayed in a work area of a display of the computing device. The displaying includes automatically adjusting the size the interactive content display panel, based on updates to the HTML content, and automatically positioning the interactive content display panel in the display, based on the automatic adjustment of the size of the interactive content display panel and based on available space in the work area of the display.
    Type: Application
    Filed: April 10, 2012
    Publication date: October 10, 2013
    Applicant: GOOGLE INC.
    Inventors: Jennifer Wai-Fung Braithwaite, Dmitry Titov, David Edwin Levin, Jian Li, Daniel Cheng, Kenneth Brian Moore, Prasad Tammana
  • Publication number: 20130182739
    Abstract: A twin-beam laser module has a housing having a first cylindrical space and a second cylindrical space, which are adjacent and parallel in axial direction to each other. A first laser assembly is directly secured inside the first cylindrical space to output a first laser beam, and an outer cylindrical casing is positioned inside the second cylindrical space. A second laser assembly is provided inside the outer cylindrical casing to output a second laser beam, and an adjustment apparatus adjusts the orientation of the outer cylindrical casing so as to align the first laser beam and the second laser beam to be parallel to each other.
    Type: Application
    Filed: April 12, 2012
    Publication date: July 18, 2013
    Applicant: Quarton, Inc.
    Inventor: Daniel Cheng
  • Patent number: 7963652
    Abstract: A method and apparatus for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries, or tracking of a cursor image on a screen by the subject through a known trajectory. One embodiment provides a method for tracking a user's eye gaze at a surface, object, or visual scene, comprising: providing an imaging device for acquiring images of at least one of the user's eves: modeling, measuring, estimating, and/or calibrating for the user's head position: providing one or more markers associated with the surface, object, or visual scene for producing corresponding glints or reflections in the user's eyes; analyzing the images to find said glints or reflections and/or the pupil: and determining eye gaze of the user upon a said one or more marker as indicative of the user's eye gaze at the surface, object, or visual scene.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: June 21, 2011
    Assignee: Queen's University at Kingston
    Inventors: Roel Vertegaal, Changuk Sohn, Daniel Cheng, Victor MacFarlane, Jeffrey S. Shell
  • Patent number: 7809160
    Abstract: Apparatus and method for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries or the tracking of a cursor image on a screen by the subject through a known trajectory. One embodiment includes one uncalibrated camera for acquiring video images of the subject's eye(s) and optionally having an on-axis illuminator, and a surface, object, or visual scene with embedded off-axis illuminator markers. The off-axis markers are reflected on the corneal surface of the subject's eyes as glints. The glints indicate the distance between the point of gaze in the surface, object, or visual scene and the corresponding marker on the surface, object, or visual scene.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: October 5, 2010
    Assignee: Queen's University at Kingston
    Inventors: Roel Vertegaal, Changuk Sohn, Daniel Cheng, Victor Macfarlane, Jeffrey S. Shell
  • Patent number: 7523583
    Abstract: A gun accessory includes a main body having an upper surface having two sides, a first side wall and a second side wall extending upwardly from each of the two sides, first and second slide members provided on the first and second side walls, respectively, and a first locating hole provided adjacent the first side wall. The accessory also includes a first locating bar pivotably coupled to the first locating hole and having a first baffle and a first press plate, and a first elastic element provided between the first press plate and the main body to pivot the first press plate with respect to the main body, and in turn drive the first baffle to protrude above the upper surface of the main body.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: April 28, 2009
    Assignee: Quarton Inc.
    Inventor: Daniel Cheng
  • Patent number: 7267540
    Abstract: A cutter hub and blade assembly for cutting polymer strands extruded from a die face in a pelletizer has cutter blades mounted on the cutter hub at a steep angle. The blades are beveled along a portion of their leading edge to form a blunt cutting edge or surface to the blades which is generally perpendicular to the die face. By beveling the leading edge of a blade supported at a steep angle to form a blunt cutting edge, the bottom surface area of the blade in contact with the die face can be significantly reduced. The reduced contact area provides several advantages including a clean cut of the pellets and a faster blade grinding when seating the blades to the die face.
    Type: Grant
    Filed: January 26, 2006
    Date of Patent: September 11, 2007
    Assignee: Gala Industries, Inc.
    Inventors: Michael A. Fridley, J. Wayne Martin, Tsung (Daniel) Cheng Chang
  • Publication number: 20070193103
    Abstract: A gun accessory includes a main body having an upper surface having two sides, a first side wall and a second side wall extending upwardly from each of the two sides, first and second slide members provided on the first and second side walls, respectively, and a first locating hole provided adjacent the first side wall. The accessory also includes a first locating bar pivotably coupled to the first locating hole and having a first baffle and a first press plate, and a first elastic element provided between the first press plate and the main body to pivot the first press plate with respect to the main body, and in turn drive the first baffle to protrude above the upper surface of the main body.
    Type: Application
    Filed: July 10, 2006
    Publication date: August 23, 2007
    Inventor: Daniel Cheng
  • Publication number: 20060110008
    Abstract: A system and method for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries or the tracking of a cursor image on a screen by the subject through a known trajectory. The preferred embodiment includes one uncalibrated camera for acquiring video images of the subject's eye(s) and optionally having an on-axis illuminator, and a surface, object, or visual scene with embedded off-axis illuminator markers. The off-axis markers are reflected on the corneal surface of the subject's eyes as glints. The glints indicate the distance between the point of gaze in the surface, object, or visual scene and the corresponding marker on the surface, object, or visual scene. The marker that causes a glint to appear in the center of the subject's pupil is determined to be located on the line of regard of the subject's eye, and to intersect with the point of gaze. Point of gaze on the surface, object, or visual scene is calculated as follows.
    Type: Application
    Filed: October 21, 2005
    Publication date: May 25, 2006
    Inventors: Roel Vertegaal, Changuk Sohn, Daniel Cheng, Victor MacFarlane
  • Publication number: 20050175218
    Abstract: A system and method for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries or the tracking of a cursor image on a screen by the subject through a known trajectory. The preferred embodiment includes one uncalibrated camera for acquiring video images of the subject's eye(s) and optionally having an on-axis illuminator, and a surface, object, or visual scene with embedded off-axis illuminator markers. The off-axis markers are reflected on the corneal surface of the subject's eyes as glints. The glints indicate the distance between the point of gaze in the surface, object, or visual scene and the corresponding marker on the surface, object, or visual scene. The marker that causes a glint to appear in the center of the subject's pupil is determined to be located on the line of regard of the subject's eye, and to intersect with the point of gaze. Point of gaze on the surface, object, or visual scene is calculated as follows.
    Type: Application
    Filed: November 15, 2004
    Publication date: August 11, 2005
    Inventors: Roel Vertegaal, Changuk Sohn, Daniel Cheng, Victor Macfarlane
  • Patent number: 6908467
    Abstract: A fixation device for internally or externally fixing fractures comprising at least one nitinol wire having an S-shaped section and two ends wherein each of said two ends forms a hook for hooking into a bone section of a fractured bone. This device can be made from nitinol which has a transformation temperature between 25° C. and 35° C. In addition, this device can have a diameter between 0.6 mm and 5 mm. The device can be inserted using the following process which starts by cooling the wire below a transfer temperature such that the nitinol wire forms in a martensite state. Next, the nitinol wire is inserted into a interphalangeal bone underneath a patients skin. Next, the nitinol wire to heats up inside a patients body above the transfer temperature. Finally, the wire transforms wire from a martensite state to an austenite state wherein when the nitinol wire elongates in a longitudinal direction to generate a distraction force.
    Type: Grant
    Filed: May 14, 2003
    Date of Patent: June 21, 2005
    Assignee: The University of Hong Kong
    Inventors: Wing Yuk Ip, Daniel Cheng Chi Hang
  • Publication number: 20030216739
    Abstract: A fixation device for internally or externally fixing fractures comprising at least one nitinol wire having an S-shaped section and two ends wherein each of said two ends forms a hook for hooking into a bone section of a fractured bone. This device can be made from nitinol which has a transformation temperature between 25° C. and 35° C. In addition, this device can have a diameter between 0.6 mm and 5 mm. The device can be inserted using the following process which starts by cooling the wire below a transfer temperature such that the nitinol wire forms in a martensite state. Next, the nitinol wire is inserted into a interphalangeal bone underneath a patients skin. Next, the nitinol wire to heats up inside a patients body above the transfer temperature. Finally, the wire transforms wire from a martensite state to an austenite state wherein when the nitinol wire elongates in a longitudinal direction to generate a distraction force.
    Type: Application
    Filed: May 14, 2003
    Publication date: November 20, 2003
    Inventors: Wing Yuk Ip, Daniel Cheng Chi Hang
  • Patent number: D532138
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: November 14, 2006
    Assignee: Quarton Inc.
    Inventors: Li-Wen Wang, Daniel Cheng
  • Patent number: D578599
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: October 14, 2008
    Inventor: Daniel Cheng