Patents by Inventor Hao Tran

Hao Tran 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: 9337942
    Abstract: A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflectarray which causes reflection and scattering in a different direction (???)° from a specular reflection direction ?° exists on a propagation path from a transmission point to a reception point RX of the radio wave, calculating a virtual reception point VRX by rotating the reception point RX about a rotation center point O, and estimating the propagation path by using the virtual reception point VRX.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: May 10, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Yasuhiro Oda, Ngoc Hao Tran, Jiyun Shen
  • Publication number: 20160091048
    Abstract: An isolator for isolating a device driven by an engine via an endless drive member is described. The isolator comprises a shaft adapter that is connectable with a shaft of the device, defining a shaft adapter axis, a rotary drive member that is rotatable relative to the shaft adapter and has an endless drive member engagement surface that is engageable with the endless drive member, and an isolation spring arrangement positioned to transfer torque between the shaft adapter and the rotary drive member. The isolation spring arrangement has at least one isolation spring that is axially offset from the endless drive member engagement surface. The at least one isolation spring has an outer edge that is radially outside the endless drive member engagement surface.
    Type: Application
    Filed: December 9, 2015
    Publication date: March 31, 2016
    Inventors: Hao Tran, Andrew M. Boyes, Boris Replete
  • Patent number: 9264157
    Abstract: A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflect array 1 (structure) which causes reflection and scattering in a predetermined direction (?-?)° different from a specular reflection direction ?° exists on a propagation path, rotating the reflect array 1 by ?/2° about a rotation center O to set a virtual rotated reflect array 2 (virtual structure), and estimating the propagation path by using the virtual rotated reflect array 2.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: February 16, 2016
    Assignee: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Jiyun Shen, Yasuhiro Oda, Ngoc Hao Tran
  • Patent number: 9184508
    Abstract: A multi-beam reflectarray includes two or more element arrays including plural elements aligned along a predetermined direction. The multi-beam reflectarray is such that, in each of a first element group and a second element group included in at least one of the element arrays, a difference between phases of radio waves reflected by corresponding two elements is in proportion to a first product of a distance between the two elements and a value of a trigonometric function with respect to an angle of reflection by the two elements, and a distance between neighboring elements in the first element group is equal to a product of a rational number and a distance between neighboring elements in the second element group.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: November 10, 2015
    Assignee: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran, Hidetoshi Kayama
  • Publication number: 20150229029
    Abstract: A reflectarray having multiple elements arranged in an array, each element having a H-shaped patch provided in separation from a ground plate, the H-shaped patch formed by four outer vertices defined by two rectangular outer patches and four inner vertices defined by an inner patch. A length of the inner patch with respect to a first direction is determined to change the reflection phase of an electric field incoming in parallel to the first direction while keeping positions of the four outer vertices and sizes of the outer patches constant. The first direction is determined by positions of the four inner vertices, and a length of the H-shaped patch with respect to a second direction is determined to change the reflection phase of an electric field incoming in parallel to the second direction, wherein the second direction is determined by positions of the four outer vertices.
    Type: Application
    Filed: September 20, 2013
    Publication date: August 13, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran
  • Publication number: 20150070246
    Abstract: A reflectarray reflects an incident wave in a desired direction, and the reflectarray includes a plurality of elements arranged in a first direction and in a second direction perpendicular to the first direction. The elements reflect the incident wave. A phase of a reflected wave by one element among the plurality of elements differs from a phase of the reflected wave by an element adjacent to the one element in the first direction by a predetermined value, and the phase of the reflected wave by the one element is equal to a phase of the reflected wave by an element adjacent to the one element in the second direction. Gap sizes between patches of a predetermined plural number of elements arranged in the first direction vary from a smallest value to a largest value. Here, an oblique TM incidence is utilized at a spurious resonance frequency.
    Type: Application
    Filed: May 20, 2013
    Publication date: March 12, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran
  • Publication number: 20150061966
    Abstract: A reflectarray reflects an incident wave in a desired direction. The reflectarray includes a substrate including a surface which is perpendicular to a predetermined axis; and at least first and second element groups, wherein the first and second element groups are disposed on the substrate, and include elements that reflect a radio wave. The first element group and the second element group reflect the radio wave with corresponding reflection phases which are different from each other. The radio wave enters while forming an angle other than 0 degrees with respect to the predetermined axis. The elements included in the first element group reflect the radio wave with a first reflection phase, and the elements included in the second element group reflect the radio wave with a second reflection phase, wherein the second reflection phase is different from the first reflection phase.
    Type: Application
    Filed: December 3, 2012
    Publication date: March 5, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Ngoc Hao Tran, Jiyun Shen
  • Publication number: 20150022414
    Abstract: A method of designing a reflectarray including a substrate having a surface perpendicular to a predetermined axis, wherein elements are disposed on the substrate. The method obtains a reflection phase of the elements as a function of a design parameter such as element spacing, when a radio wave enters the arranged elements, and stores a relationship between the reflection phase and the design parameter in a memory. Here, the design parameter is equally set for the elements. The method repeatedly determines, for each of the elements, the design parameter of a specific element in accordance with the relationship. The function of the design parameter has a range of almost 360 degrees with respect to a range of the design parameter. The reflection phase is the continuous function of the element spacing such that two resonant points occur at which the reflection phase becomes zero.
    Type: Application
    Filed: December 3, 2012
    Publication date: January 22, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Ngoc Hao Tran, Jiyun Shen
  • Publication number: 20150015455
    Abstract: A reflectarray reflects an incident wave in a desired direction. The reflectarray includes a substrate including a surface which is perpendicular to a predetermined axis, and elements disposed on the substrate. A specific element among the elements reflects the incident wave with a specific reflection phase among a plurality of reflection phases. Each of the elements has an element structure including, at least, a patch and a ground plate. Element spacing of first neighboring elements is different from element spacing of second neighboring elements, and a length of a gap between patches of the first neighboring elements is equal to a length of a gap between patches of the second neighboring elements.
    Type: Application
    Filed: December 3, 2012
    Publication date: January 15, 2015
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Jiyun Shen, Ngoc Hao Tran
  • Publication number: 20140351117
    Abstract: The present invention seeks to provide methods and systems for the online exchange of business services between merchants, wherein credit is approved and used to establish virtual value recognition documents such as gift cards or coupons and acquire gift cards or coupons of other merchants. The website owner can generate revenue by retaining a percentage of the gift cards or coupons and reselling them to non-merchant users at a discount to the gift card face value.
    Type: Application
    Filed: December 14, 2011
    Publication date: November 27, 2014
    Inventor: Hao Tran
  • Publication number: 20130229296
    Abstract: A multi-beam reflectarray includes two or more element arrays including plural elements aligned along a predetermined direction. The multi-beam reflectarray is such that, in each of a first element group and a second element group included in at least one of the element arrays, a difference between phases of radio waves reflected by corresponding two elements is in proportion to a first product of a distance between the two elements and a value of a trigonometric function with respect to an angle of reflection by the two elements, and a distance between neighboring elements in the first element group is equal to a product of a rational number and a distance between neighboring elements in the second element group.
    Type: Application
    Filed: August 15, 2012
    Publication date: September 5, 2013
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran, Hidetoshi Kayama
  • Publication number: 20120303328
    Abstract: A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflect array 1 (structure) which causes reflection and scattering in a predetermined direction (?-?)° different from a specular reflection direction ?° exists on a propagation path, rotating the reflect array 1 by ?/2° about a rotation center O to set a virtual rotated reflect array 2 (virtual structure), and estimating the propagation path by using the virtual rotated reflect array 2.
    Type: Application
    Filed: December 3, 2010
    Publication date: November 29, 2012
    Applicant: NTT DOCOMO, INC
    Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Jiyun Shen, Yasuhiro Oda, Ngoc Hao Tran
  • Publication number: 20120302177
    Abstract: A propagation path estimation method using an imaging method according to the invention includes a step of, in a case where a reflectarray which causes reflection and scattering in a different direction (???)° from a specular reflection direction ?° exists on a propagation path from a transmission point to a reception point RX of the radio wave, calculating a virtual reception point VRX by rotating the reception point RX about a rotation center point O, and estimating the propagation path by using the virtual reception point VRX.
    Type: Application
    Filed: December 6, 2010
    Publication date: November 29, 2012
    Applicant: NTT DOCOMO, INC.
    Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Yasuhiro Oda, Ngoc Hao Tran, Jiyun Shen
  • Publication number: 20090276816
    Abstract: A method for obtaining and distributing video having the steps of: receiving a request for a video recording device from a user; sending a video recording device to the user; receiving the video recording device from the user, the video recording device having stored thereon a video about a subject; collecting information about the subject of the video; and transferring the video from the video recording device and the collected information about the subject to a database accessible via a global computer network.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 5, 2009
    Inventor: Anh Hao Tran
  • Patent number: 7108623
    Abstract: A fan idler pulley having a threaded hub for attaching a fan shaft. The pulley also comprises a receiving portion for engaging a bearing. The bearing is further engaged with a cup. The entire assembly is mounted by a pin press fit though the cup into a mounting surface such as an engine block or front cover. The pulley may be engaged to either the inner race or the outer race of the bearing.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: September 19, 2006
    Assignee: The Gates Corporation
    Inventors: Marc R. Cadarette, Yahya Hodjat, Michel Ozorak, Hao Tran
  • Publication number: 20030008743
    Abstract: A fan idler pulley having a threaded hub for attaching a fan shaft. The pulley also comprises a receiving portion for engaging a bearing. The bearing is further engaged with a cup. The entire assembly is mounted by a pin press fit though the cup into a mounting surface such as an engine block or front cover. The pulley may be engaged to either the inner race or the outer race of the bearing.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 9, 2003
    Inventors: Marc R. Cadarette, Yahya Hodjat, Michel Ozorak, Hao Tran