Patents by Inventor Arthur Hsu Chen Chang
Arthur Hsu Chen Chang 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: 20230372201Abstract: Embodiments provide methods and apparatus for manufacturing a microtablet from a precursor material such as a pharmaceutical powder. Various embodiments provide a method which includes compressing the powder to form a compressed mass of a selected density and repeatedly compacting the compressed mass to increase the density of the compressed mass and form a microtablet. Related methods and apparatus are provided.Type: ApplicationFiled: August 4, 2023Publication date: November 23, 2023Inventors: Mir A. IMRAN, Arthur Hsu Chen Chang, Chang Jin Ong, Delia Anna Gratta
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Patent number: 11779522Abstract: Embodiments provide methods and apparatus for manufacturing a microtablet from a precursor material such as a pharmaceutical powder. Various embodiments provide a method which includes compressing the powder to form a compressed mass of a selected density and repeatedly compacting the compressed mass to increase the density of the compressed mass and form a microtablet. Related methods and apparatus are provided.Type: GrantFiled: December 5, 2019Date of Patent: October 10, 2023Assignee: InCube Labs, LLCInventors: Mir A. Imran, Arthur Hsu Chen Chang, Chang Jin Ong, Delia Anna Gratta
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Publication number: 20220080122Abstract: Systems, devices and methods are provided for administering a carrier incorporating a therapeutic preparation within a subject. A device includes a carrier, and a launch assembly to deploy the carrier by ejecting the carrier from the device and into internal tissue of the subject. The device detects a status of deployment of the carrier. A system includes a delivery device, a carrier disposed in the delivery device, a launch assembly, and detection circuitry. The launch assembly causes the carrier to exit the delivery device so as to penetrate internal tissue of the subject. The system determines a status of deployment of the carrier using the detection circuitry. A method includes introducing a launch assembly within the subject, the launch assembly coupled to a carrier; deploying, by the launch assembly, the carrier; and detecting a status of deployment of the carrier.Type: ApplicationFiled: November 29, 2021Publication date: March 17, 2022Applicant: INCUBE LABS, LLCInventors: Mir A. IMRAN, Arthur Hsu Chen CHANG
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Publication number: 20200179228Abstract: Embodiments provide methods and apparatus for manufacturing a microtablet from a precursor material such as a pharmaceutical powder. Various embodiments provide a method which includes compressing the powder to form a compressed mass of a selected density and repeatedly compacting the compressed mass to increase the density of the compressed mass and form a microtablet. Related methods and apparatus are provided.Type: ApplicationFiled: December 5, 2019Publication date: June 11, 2020Inventors: Mir A. Imran, Arthur Hsu Chen Chang, Chang Jin Ong, Delia Anna Gratta
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Patent number: 10218289Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.Type: GrantFiled: January 17, 2013Date of Patent: February 26, 2019Assignee: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
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Patent number: 9786423Abstract: A system for generating an asymmetric magnetic field. The system includes a drive circuit and a stacked winding structure coupled to the drive circuit. The stacked winding structure includes a plurality of winding layers. The plurality of winding layers includes a first winding layer including a first conductive winding having first turns and a second winding layer including a second conductive winding having second turns ion. The plurality of winding layers is arranged to produce a first magnetic field at a first side of the stacked winding structure and a second magnetic field at a second side of the stacked winding structure when the drive circuit electrically drives the plurality of winding layers. The first magnetic field is greater than the second magnetic field.Type: GrantFiled: October 28, 2014Date of Patent: October 10, 2017Assignee: Massachusetts Institute of TechnologyInventors: Al-Thaddeus Avestruz, Arijit Banerjee, Arthur Hsu Chen Chang, Shahriar R. Khushrushahi, Steven B. Leeb
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Patent number: 9762145Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.Type: GrantFiled: January 17, 2013Date of Patent: September 12, 2017Assignee: Massachusetts Institute of TechnologyInventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
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Patent number: 9407164Abstract: Described is a method and apparatus for per-panel photovoltaic energy extraction with integrated converters. Also described are switched-capacitor (SC) converters have been evaluated for many applications because of the possibility for on-chip integration; applications to solar arrays are no exception. Also described is a comprehensive system-level look at solar installations, finding possibilities for optimization at and between all levels of operation in an array. Specifically, novel concepts include new arrangements and options for applying switched-capacitor circuits at 3 levels: for the panel and sub-panel level, as part of the overall control strategy, and for ensuring stable and robust interface to the grid with the possibility of eliminating or reducing the use of electrolytic capacitors.Type: GrantFiled: February 3, 2013Date of Patent: August 2, 2016Assignee: Massachusetts Institute of TechnologyInventors: Arthur Hsu Chen Chang, David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb
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Patent number: 9374020Abstract: Described herein is a stacked switched capacitor (SSC) energy buffer circuit architecture and related design and control techniques.Type: GrantFiled: January 17, 2013Date of Patent: June 21, 2016Assignee: Massachusetts Institute of TechnologyInventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
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Publication number: 20150144176Abstract: Power production among photovoltaic elements can be equalized through charge redistribution, which can reduce or eliminate the effect of partial shading. Also described is a technique for differential power processing by individually setting currents through different strings of photovoltaic elements.Type: ApplicationFiled: November 21, 2014Publication date: May 28, 2015Applicant: Massachusetts Institute of TechnologyInventors: Arthur Hsu Chen Chang, AI-Thaddeus Avestruz, Steven B. Leeb
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Publication number: 20150116887Abstract: A system for generating an asymmetric magnetic field. The system includes a drive circuit and a stacked winding structure coupled to the drive circuit. The stacked winding structure includes a plurality of winding layers. The plurality of winding layers includes a first winding layer including a first conductive winding having first turns and a second winding layer including a second conductive winding having second turns ion. The plurality of winding layers is arranged to produce a first magnetic field at a first side of the stacked winding structure and a second magnetic field at a second side of the stacked winding structure when the drive circuit electrically drives the plurality of winding layers. The first magnetic field is greater than the second magnetic field.Type: ApplicationFiled: October 28, 2014Publication date: April 30, 2015Applicant: Massachusetts Institute of TechnologyInventors: Al-Thaddeus Avestruz, Arijit Banerjee, Arthur Hsu Chen Chang, Shahriar R. Khushrushahi, Steven B. Leeb
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Publication number: 20140355322Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.Type: ApplicationFiled: January 17, 2013Publication date: December 4, 2014Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
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Publication number: 20140339918Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.Type: ApplicationFiled: January 17, 2013Publication date: November 20, 2014Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGYInventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
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Publication number: 20140167513Abstract: Described is a method and apparatus for per-panel photovoltaic energy extraction with integrated converters. Also described are switched-capacitor (SC) converters have been evaluated for many applications because of the possibility for on-chip integration; applications to solar arrays are no exception. Also described is a comprehensive system-level look at solar installations, finding possibilities for optimization at and between all levels of operation in an array. Specifically, novel concepts include new arrangements and options for applying switched-capacitor circuits at 3 levels: for the panel and sub-panel level, as part of the overall control strategy, and for ensuring stable and robust interface to the grid with the possibility of eliminating or reducing the use of electrolytic capacitors.Type: ApplicationFiled: February 3, 2013Publication date: June 19, 2014Inventors: Arthur Hsu Chen Chang, David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb