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).
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Patent number: 9337942Abstract: 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: GrantFiled: December 6, 2010Date of Patent: May 10, 2016Assignee: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Yasuhiro Oda, Ngoc Hao Tran, Jiyun Shen
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Publication number: 20160091048Abstract: 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: ApplicationFiled: December 9, 2015Publication date: March 31, 2016Inventors: Hao Tran, Andrew M. Boyes, Boris Replete
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Patent number: 9264157Abstract: 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: GrantFiled: December 3, 2010Date of Patent: February 16, 2016Assignee: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Jiyun Shen, Yasuhiro Oda, Ngoc Hao Tran
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Patent number: 9184508Abstract: 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: GrantFiled: August 15, 2012Date of Patent: November 10, 2015Assignee: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran, Hidetoshi Kayama
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Publication number: 20150229029Abstract: 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: ApplicationFiled: September 20, 2013Publication date: August 13, 2015Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran
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Publication number: 20150070246Abstract: 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: ApplicationFiled: May 20, 2013Publication date: March 12, 2015Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran
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Publication number: 20150061966Abstract: 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: ApplicationFiled: December 3, 2012Publication date: March 5, 2015Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Ngoc Hao Tran, Jiyun Shen
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Publication number: 20150022414Abstract: 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: ApplicationFiled: December 3, 2012Publication date: January 22, 2015Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Ngoc Hao Tran, Jiyun Shen
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Publication number: 20150015455Abstract: 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: ApplicationFiled: December 3, 2012Publication date: January 15, 2015Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Hidetoshi Kayama, Jiyun Shen, Ngoc Hao Tran
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Publication number: 20140351117Abstract: 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: ApplicationFiled: December 14, 2011Publication date: November 27, 2014Inventor: Hao Tran
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Publication number: 20130229296Abstract: 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: ApplicationFiled: August 15, 2012Publication date: September 5, 2013Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Yasuhiro Oda, Jiyun Shen, Ngoc Hao Tran, Hidetoshi Kayama
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Publication number: 20120303328Abstract: 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: ApplicationFiled: December 3, 2010Publication date: November 29, 2012Applicant: NTT DOCOMO, INCInventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Jiyun Shen, Yasuhiro Oda, Ngoc Hao Tran
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Publication number: 20120302177Abstract: 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: ApplicationFiled: December 6, 2010Publication date: November 29, 2012Applicant: NTT DOCOMO, INC.Inventors: Tamami Maruyama, Tatsuo Furuno, Tomoyuki Ohya, Yasuhiro Oda, Ngoc Hao Tran, Jiyun Shen
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Publication number: 20090276816Abstract: 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: ApplicationFiled: May 5, 2008Publication date: November 5, 2009Inventor: Anh Hao Tran
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Patent number: 7108623Abstract: 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: GrantFiled: July 2, 2002Date of Patent: September 19, 2006Assignee: The Gates CorporationInventors: Marc R. Cadarette, Yahya Hodjat, Michel Ozorak, Hao Tran
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Publication number: 20030008743Abstract: 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: ApplicationFiled: July 2, 2002Publication date: January 9, 2003Inventors: Marc R. Cadarette, Yahya Hodjat, Michel Ozorak, Hao Tran