Patents by Inventor Quan Jiang
Quan Jiang 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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Publication number: 20140321002Abstract: A magnetic disk drive device for rotary driving a magnetic disk may be provided. The magnetic disk drive device may include a drive motor for rotary driving the magnetic disk. The drive motor may include a motor hub which has motor hub support portion with a screw-type motor hub engaging portion, and a motor hub support surface for supporting the magnetic disk. The magnetic disk drive device may also include a clamp disk including a clamp disk support portion with a screw-type clamp disk engaging portion complementary to the motor hub engaging portion, and a clamp disk support surface for supporting the magnetic disk.Type: ApplicationFiled: April 24, 2014Publication date: October 30, 2014Applicant: Agency for Science, Technology and ResearchInventors: Yin Qian Yu, Chao Bi, Quan Jiang
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Publication number: 20140323725Abstract: Provided herein are processes for synthesizing dihydropyridophthalazinone derivatives, such as for example, 5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one and its stereoisomers, which are potent poly(ADP-ribose)polymerase (PARP) inhibitors as well as novel synthetic intermediate compounds.Type: ApplicationFiled: June 2, 2014Publication date: October 30, 2014Applicant: BioMarin Pharmaceutical Inc.Inventors: Bing Wang, Daniel Chu, Yongbo Liu, Quan Jiang, Lei Lu
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Patent number: 8765945Abstract: Provided herein are processes for synthesizing dihydropyridophthalazinone derivatives, such as for example, 5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one and its stereoisomers, which are potent poly(ADP-ribose)polymerase (PARP) inhibitors as well as novel synthetic intermediate compounds.Type: GrantFiled: February 8, 2011Date of Patent: July 1, 2014Assignee: BioMarin Pharmaceutical Inc.Inventors: Bing Wang, Daniel Chu, Yongbo Liu, Quan Jiang, Lei Lu
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Patent number: 8610392Abstract: A runout measurement system is proposed for measuring the runout of a moving surface of a device having a rotating body, such as a mass storage device (100) (e.g. a hard disk drive) having a rotor which in use includes a rotating recording medium. A sensor (102) interacting with the moving surface obtains a displacement signal. The displacement signal is sampled by a sampling unit (104) controlled by a unit (109) which initiates sampling based on both a signal indicating a ZCP and the clock signal of a high frequency (e.g. 20 MHz) clock (106). Simultaneously, the same clock (106) is used by a counter 108 to measure the spacing between one or more ZCP times. This permits the correspondence between the sampling times and the angular position of the rotor to be found with a high accuracy which depends upon the clock frequency, and thereby allows calculation of repeatable runout (RRO) and non-repeatable runout (NRRO).Type: GrantFiled: December 2, 2008Date of Patent: December 17, 2013Assignee: Agency for Science, Technology and ResearchInventors: Quan Jiang, Chao Bi, Song Lin
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Patent number: 8575797Abstract: A low profile permanent magnet synchronous motor with segment structure. In accordance with this invention, a stator assembly for an electromagnetic motor is provided. The stator assembly has a first stator core and a second stator core that couple windings. Teeth extend outward from each stator core and through the windings to contact the other stator core.Type: GrantFiled: May 7, 2008Date of Patent: November 5, 2013Assignee: Agency for Science, Technology and ResearchInventors: Chao Bi, Quan Jiang, Song Lin, Nay Lin Htun Aung, Hla Nu Phyu
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Publication number: 20130184475Abstract: Provided are compositions for treatment of cancers, including breast cancer, comprising at least one novel daidzein analog, as well as methods of using the same for preventing or treating cancer or tumor growth.Type: ApplicationFiled: July 8, 2011Publication date: July 18, 2013Applicants: THE ADMINISTRATORS OF THE TULANE EDUCATIONAL FUND, XAVIER UNIVERSITY OF LOUISIANNA, UNITED STATES DEPARTMENT OF AGRICULTUREInventors: Guangdi Wang, Matthew E. Burow, Stephen M. Boue, Thomas E. Wiese, Quan Jiang
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Patent number: 8130490Abstract: A detachable hard drive with an electromagnetic switch comprises a tray, a fastening unit and an electromagnetic switch. The electromagnetic switch is powered on when the hard drive is in operation, and sequentially the fastening unit is electrically controlled by the electromagnetic switch to automatically fasten with the housing body of an electronic product. On the contrary, the electromagnetic switch is powered off when the hard drive stops the operation so as to the hard drive can be released from the electronic product. Thus, the invention relating to the detachable hard drive with an electromagnetic switch is to ensure the hard drive can be securely released from the electronic product when the electromagnetic switch is powered off for preventing the data erased and the firmware damaged.Type: GrantFiled: November 27, 2007Date of Patent: March 6, 2012Assignee: Wistron CorporationInventors: Shun-Quan Jiang, Tzu-Yi Huang
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Publication number: 20110273837Abstract: A detachable hard drive with an electromagnetic switch comprises a tray, a fastening unit and an electromagnetic switch. The electromagnetic switch is powered on when the hard drive is in operation, and sequentially the fastening unit is electrically controlled by the electromagnetic switch to automatically fasten with the housing body of an electronic product. On the contrary, the electromagnetic switch is powered off when the hard drive stops the operation so as to the hard drive can be released from the electronic product. Thus, the invention relating to the detachable hard drive with an electromagnetic switch is to ensure the hard drive can be securely released from the electronic product when the electromagnetic switch is powered off for preventing the data erased and the firmware damaged.Type: ApplicationFiled: November 27, 2007Publication date: November 10, 2011Inventors: Shun-Quan Jiang, Tzu-Yi Huang
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Publication number: 20110239761Abstract: A runout measurement system is proposed for measuring the runout of a moving surface of a device having a rotating body, such as a mass storage device (100) (e.g. a hard disk drive) having a rotor which in use includes a rotating recording medium. A sensor (102) interacting with the moving surface obtains a displacement signal. The displacement signal is sampled by a sampling unit (104) controlled by a unit (109) which initiates sampling based on both a signal indicating a ZCP and the clock signal of a high frequency (e.g. 20 MHz) clock (106). Simultaneously, the same clock (106) is used by a counter 108 to measure the spacing between one or more ZCP times. This permits the correspondence between the sampling times and the angular position of the rotor to be found with a high accuracy which depends upon the clock frequency, and thereby allows calculation of repeatable runout (RRO) and non-repeatable runout (NRRO).Type: ApplicationFiled: December 2, 2008Publication date: October 6, 2011Inventors: Quan Jiang, Chao Bi, Song Lin
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Publication number: 20110213870Abstract: A method, system and computer program product for providing a service to multiple tenants of an application. Responsive to receiving from a client of a tenant a request, a tenant context of the tenant is bound to the request. With respect to an access to an isolation point of the application in the request, the access to the isolation point is redirected to a partition based on the tenant context bound to the request. The partition may be pre-established for the tenant with respect to the application. Hence, it is possible to provide a multi-tenant solution in a convenient, fast, and cost-effective way, and, in turn, to achieve resource sharing to a greater extent and enhance the resource efficiency.Type: ApplicationFiled: February 25, 2011Publication date: September 1, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hong Cai, Jun Jie Cai, Wei Gong, Lin Quan Jiang, Jing Lv, Xin Sheng Mao, Heng Wang, Hai Hong Xu, Ke Zhang, Min Jun Zhou
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Publication number: 20110196153Abstract: Provided herein are processes for synthesizing dihydropyridophthalazinone derivatives, such as for example, 5-fluoro-8-(4-fluorophenyl)-9-(1-methyl-1H-1,2,4-triazol-5-yl)-8,9-dihydro-2H-pyrido[4,3,2-de]phthalazin-3(7H)-one and its stereoisomers, which are potent poly(ADP-ribose)polymerase (PARP) inhibitors as well as novel synthetic intermediate compounds.Type: ApplicationFiled: February 8, 2011Publication date: August 11, 2011Inventors: Bing Wang, Daniel Chu, Yongbo Liu, Quan Jiang, Lei Lu
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Publication number: 20110133589Abstract: A low profile permanent magnet synchronous motor with segment structure. In accordance with this invention, a stator assembly for an electromagnetic motor is provided. The stator assembly has a first stator core and a second stator core that couple windings. Teeth extend outward from each stator core and through the windings to contact the other stator core.Type: ApplicationFiled: May 7, 2008Publication date: June 9, 2011Inventors: Chao Bi, Quan Jiang, Song Lin, Nay Lin Htun Aung, Hla Nu Phyu
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Publication number: 20100253170Abstract: A low profile spindle motor for supporting and rotating media disk or disks of a hard disk drive includes a plurality of stator teeth, a winding layer which may be formed by printed circuit board or the like, and a rotor. The plurality of stator teeth are disposed in an annular region surrounding an axis of rotation of the motor, and have projected ends for increasing the tooth area facing a magnet ring of the rotor. The winding layer has a plurality of windings disposed surrounding the axis of rotation. Each winding is coupled to one of the plurality of stator teeth. The magnet ring is positioned radially spaced apart and coplanar with the annular region. The magnet ring has magnetic poles annularly distributed to generate magnetic fluxes along radial direction. Spindle motor formed according to the invention has a low profile, improved performance and manufacturability.Type: ApplicationFiled: May 9, 2008Publication date: October 7, 2010Applicant: AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCHInventors: Chao Bi, Quan Jiang, Song Ling, Nay Lin Htun Aung, Hla Nu Phyu
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Patent number: 7721016Abstract: A method of initiating re-enumeration of a USB device without manual intervention is provided. The method involves a sequence emulating detachment and re-attachment of a device to the host while the device remains attached to the host. As the device remains attached to the host throughout the sequence, the host OS is manipulated to receive a plurality of preset device states in order for it to perceive a device change and to eventually initiate device enumeration. The sequence, which involves a series of command exchanges between the device and the host, may be initiated by a software application residing in the host upon an event requiring device enumeration.Type: GrantFiled: February 12, 2007Date of Patent: May 18, 2010Assignee: Seagate Technology LLCInventors: Wen Xiang Xie, Sze Chek Tan, Yew Meng Tan, Zhong Quan Jiang
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Publication number: 20090073614Abstract: A voice coil motor has an arm for arcuate movement about a pivot, and a coil at one end of the arm. There is a permanent magnet mounted adjacent the coil. The permanent magnet has only one pole facing, and for operational co-operation with, the coil. The coil has a centre of mass and a geometric centre. The center of mass and the geometric centre are coincident. The coil is mounted to the arm perpendicular to a movement plane of the arm for the arcuate movement.Type: ApplicationFiled: April 26, 2006Publication date: March 19, 2009Inventors: Chao Bi, Quan Jiang, Song Ling
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Publication number: 20080195765Abstract: A method of initiating re-enumeration of a USB device without manual intervention is provided. The method involves a sequence emulating detachment and re-attachment of a device to the host while the device remains attached to the host. As the device remains attached to the host throughout the sequence, the host OS is manipulated to receive a plurality of preset device states in order for it to perceive a device change and to eventually initiate device enumeration. The sequence, which involves a series of command exchanges between the device and the host, may be initiated by a software application residing in the host upon an event requiring device enumeration.Type: ApplicationFiled: February 12, 2007Publication date: August 14, 2008Applicant: SEAGATE TECHNOLOGY LLCInventors: Wen Xiang Xie, Sze Chek Tan, Yew Meng Tan, Zhong Quan Jiang
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Patent number: 7251416Abstract: Systems and methods for optical cross connects which switch data at a container (packet) level. In one embodiment, a plurality of optical switch edges are coupled to an optical switch core via a minimal number of optical fibers. The switch core is configured to optically switch data from an ingress edge to one of a plurality of egress edges in a nonblocking fashion. The ingress edge receives data streams and distributes the data among a plurality of container processors. Each of these container processors produces an optical signal of a different wavelength, which can then be multiplexed with others to form a multiple-wavelength optical signal that is transmitted to the switch core. The switch core then switches successive portions (containers) of the multiple-wavelength signal to the egress edges to which they are respectively destined. The respective egress edges perform the reverse of this process to form output data signals.Type: GrantFiled: May 8, 2003Date of Patent: July 31, 2007Assignee: Yotta networks, LLCInventors: Lakshman S. Tamil, Glen Collier, Mitch Entezari, Allesandro Fabbri, Gopalakrishnan Hari, Justin Hunt, Quan Jiang, Bing Li, Lee McFearin, Joseph M. McQuade, Earl Ponceti, Scott A. Rothrock, Frederick A. Rush, Alexander A. Smith, David Wolf
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Patent number: 6879124Abstract: In the present system and method, ZCP level signals of each phase voltage are first obtained. Among the detected ZCP level signals, some ZCPs are generated by phase back EMF, which are true ZCPs and other ZCPs by commutations, which are false ZCPs. The duration of the false ZCP level outputs varies with the excited phase current, inductance and back EMF of motors, the present invention utilizes fixed-width narrow pulse signals corresponding to the rising and falling edges of the ZCP level outputs in order to eliminate influences of the earlier disclosed motor parameters. These fixed width pulse signals make up the ZCP pulse signal. Because the first edge of the plurality of false ZCP level signal substantially corresponds to the switching-off signal of the commutated-off excited phase, a first false ZCP masking signal having pulses wider than the ZCP pulse signal are applied to mask the first plurality of false ZCP signals.Type: GrantFiled: January 7, 2004Date of Patent: April 12, 2005Inventors: Quan Jiang, Chao Bi
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Patent number: 6542699Abstract: A camera is provided with an object lens, an aperture and a guiding device for an image-recording medium. The camera includes a device for providing generally scattered or white light to be incident on a first portion of the image-recording medium and a light adjusting device for varying the dissipation of the white or scatted light across the aperture of the camera in relation to the exposure time across the aperture. The camera also includes a lens system with an object lens and an additional focusing device with a focal length in a first area being infinite and in a second area being a relatively short focusing light on the image close to the lens system, for example, on the plate held in front of the lens system. A light enhancement device is also provided for increasing the light on the first portion of the image-recording medium.Type: GrantFiled: May 2, 2001Date of Patent: April 1, 2003Assignee: Ginfax Development LimitedInventors: Ming Tung Lau, Quan Jiang
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Publication number: 20010028797Abstract: A camera is provided with an object lens, an aperture and a guiding device for an image-recording medium. The camera includes a device for providing generally scattered or white light to be incident on a first portion of the image-recording medium and a light adjusting device for varying the dissipation of the white or scatted light across the aperture of the camera in relation to the exposure time across the aperture. The camera also includes a lens system with an object lens and an additional focusing device with a focal length in a first area being infinite and in a second area being a relatively short focusing light on the image close to the lens system, for example, on the plate held in front of the lens system. A light enhancement device is also provided for increasing the light on the first portion of the image-recording medium.Type: ApplicationFiled: May 2, 2001Publication date: October 11, 2001Applicant: Ginfax Development LimitedInventors: Ming Tung Lau, Quan Jiang