Patents by Inventor Andrew Kwok
Andrew Kwok 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: 20230389918Abstract: A medical device for approximating and securing tissue without requiring knots includes a lock-head, a strap section, distal protuberance, and a leader section. The device also includes a transition section between the leader and the strap section and a stiffening section proximal to the protuberance. The leader section is used to draw the strap section into the body through small apertures in tissue and the transition section provides a gradual transition in stiffness and size between the leader and the strap section.Type: ApplicationFiled: August 14, 2023Publication date: December 7, 2023Inventors: Thomas A. Kramer, Albert K. Chin, Gannon Borchers, Peter Bugos, Andrew Kwok, Steven Ledbetter
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Patent number: 11793508Abstract: A medical device for approximating and securing tissue without requiring knots includes a lock-head, a strap section, distal protuberance, and a leader section. The device also includes a transition section between the leader and the strap section and a stiffening section proximal to the protuberance. The leader section is used to draw the strap section into the body through small apertures in tissue and the transition section provides a gradual transition in stiffness and size between the leader and the strap section.Type: GrantFiled: September 28, 2020Date of Patent: October 24, 2023Assignee: TAS Medical, Inc.Inventors: Thomas A. Kramer, Albert K. Chin, Gannon Borchers, Peter Bugos, Andrew Kwok, Steven Ledbetter
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Publication number: 20220346779Abstract: A medical device for approximating and securing tissue without requiring knots includes a lock-head, a strap section, distal protuberance, and a leader section. The device also includes a transition section between the leader and the strap section and a stiffening section proximal to the protuberance. The leader section is used to draw the strap section into the body through small apertures in tissue and the transition section provides a gradual transition in stiffness and size between the leader and the strap section.Type: ApplicationFiled: September 28, 2020Publication date: November 3, 2022Inventors: Thomas A. Kramer, Albert K. Chin, Gannon Borchers, Peter Bugos, Andrew Kwok, Steven Ledbetter
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Publication number: 20210186700Abstract: A valve prosthetic implant for treating a vein or other blood vessel includes a tubular, expandable anchoring frame extending from a proximal end to a distal end of the implant, a valve seat formed at or near the middle of the anchoring frame, an expandable ball disposed within the lumen of the anchoring frame, and a ball retention tether attached to the expandable ball and to the valve seat and/or the anchoring frame. The anchoring frame may include a cylindrical proximal portion at the proximal end, a cylindrical distal portion at the distal end, an inwardly angled inlet portion between the cylindrical proximal portion and a middle of the anchoring frame, and an inwardly angled outlet portion between the cylindrical distal portion and the middle of the anchoring frame.Type: ApplicationFiled: January 6, 2021Publication date: June 24, 2021Inventors: Albert K CHIN, Andrew MOLL, Andrew KWOK, Thomas A KRAMER, Austin WALKER, Eric CHEN
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Patent number: 10912647Abstract: A valve prosthetic implant for treating a vein or other blood vessel includes a tubular, expandable anchoring frame extending from a proximal end to a distal end of the implant, a valve seat formed at or near the middle of the anchoring frame, an expandable ball disposed within the lumen of the anchoring frame, and a ball retention tether attached to the expandable ball and to the valve seat and/or the anchoring frame. The anchoring frame may include a cylindrical proximal portion at the proximal end, a cylindrical distal portion at the distal end, an inwardly angled inlet portion between the cylindrical proximal portion and a middle of the anchoring frame, and an inwardly angled outlet portion between the cylindrical distal portion and the middle of the anchoring frame.Type: GrantFiled: June 13, 2018Date of Patent: February 9, 2021Assignee: INNOVEIN, INC.Inventors: Albert K Chin, Andrew Moll, Andrew Kwok, Thomas A Kramer, Austin Walker, Eric Chen
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Publication number: 20180289486Abstract: A valve prosthetic implant for treating a vein or other blood vessel includes a tubular, expandable anchoring frame extending from a proximal end to a distal end of the implant, a valve seat formed at or near the middle of the anchoring frame, an expandable ball disposed within the lumen of the anchoring frame, and a ball retention tether attached to the expandable ball and to the valve seat and/or the anchoring frame. The anchoring frame may include a cylindrical proximal portion at the proximal end, a cylindrical distal portion at the distal end, an inwardly angled inlet portion between the cylindrical proximal portion and a middle of the anchoring frame, and an inwardly angled outlet portion between the cylindrical distal portion and the middle of the anchoring frame.Type: ApplicationFiled: June 13, 2018Publication date: October 11, 2018Inventors: Andrew MOLL, Andrew KWOK, Albert K. CHIN, Thomas A. KRAMER, Austin WALKER, Eric CHEN
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Patent number: 9785983Abstract: A system and method for detecting billing errors using predictive models is provided. The system includes a computer system and a billing error detection engine capable of detecting billing errors using predictive modeling techniques. The system receives and pre-processes billing information. The system then applies one or more predictive models to the information to identify billing errors. The results could be optionally sent to, and reviewed by, third party auditors, whereby their feedback could be incorporated into the results. A final report is generated by the system which indicates billing errors that require correction, thereby allowing an entity to correct such errors and prevent revenue leakage.Type: GrantFiled: June 13, 2013Date of Patent: October 10, 2017Assignee: Opera Solutions U.S.A., LLCInventors: Qi Zhao, Andrew Kwok, Manjunatha Jagalur, Eric Doi, Abhikesh Nag, Jacob Spoelstra
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Patent number: 9525352Abstract: The drive current of the switch in a switching power converter is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the switch drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the switch drive current.Type: GrantFiled: June 18, 2013Date of Patent: December 20, 2016Assignee: Dialog Semiconductor Inc.Inventors: Junjie Zheng, Jun Zheng, Andrew Kwok-Cheung Lee, John William Kesterson, Allan Ming-Lun Lin, Hien Huu Bui, Carrie Seim, Yong Li
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Patent number: 9391525Abstract: A controller of a switching power converter includes a voltage protection circuit that generates a modified supply voltage that does not exceed a predetermined threshold voltage to power one or more components of the controller.Type: GrantFiled: September 19, 2013Date of Patent: July 12, 2016Assignee: Dialog Semiconductor Inc.Inventors: Andrew Kwok-Cheung Lee, Jiang Chen, Yong Li
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Patent number: 9369054Abstract: The embodiments herein describe a switched mode power converter. In particular, the embodiments herein disclose techniques for reducing power consumption of a synchronous rectifier controller of the switched mode power converter. The switched mode power converter includes a plurality of circuit components that control operation of a synchronous rectifier included in the switched mode power converter. One or more of the circuit components may be disabled to reduce power consumption.Type: GrantFiled: May 7, 2014Date of Patent: June 14, 2016Assignee: Dialog Semiconductor Inc.Inventors: Pengju Kong, Andrew Kwok-Cheung Lee
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Patent number: 9112498Abstract: The embodiments herein describe a dynamic metal-oxide-semiconductor field-effect transistor (MOSFET) gate driver system architecture and control scheme. The MOSFET gate driver system dynamically adjusts both the gate driver turn-on-resistance and the gate driver turn-off resistance within a single (i.e., one) switching cycle to reduce electromagnetic interference (EMI) in the system and to minimize the conduction loss of a power MOSFET during operation.Type: GrantFiled: August 7, 2012Date of Patent: August 18, 2015Assignee: Dialog Semiconductor Inc.Inventors: Yong Li, Fuqiang Shi, Andrew Kwok-Cheung Lee, David Nguyen, Jiang Chen
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Patent number: 9101015Abstract: A power converter that controls a collector current of a bipolar junction transistor (BJT) by controlling the base current to the BJT after having determined the gain of the BJT. A gain detection block determines a gain of the BJT during a first mode. A current calculation block generates a current setting for the base current based on the gain of the BJT determined by the gain detection block during a second mode distinct from the first mode. In some embodiments, the power converter may be included in a LED lamp system.Type: GrantFiled: March 13, 2012Date of Patent: August 4, 2015Assignee: Dialog Semiconductor Inc.Inventors: Liang Yan, Clarita C. Poon, Hien Huu Bui, Chuanyang Wang, Andrew Kwok-Cheung Lee, John William Kesterson
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Publication number: 20150124495Abstract: The embodiments herein describe a switched mode power converter. In particular, the embodiments herein disclose techniques for reducing power consumption of a synchronous rectifier controller of the switched mode power converter. The switched mode power converter includes a plurality of circuit components that control operation of a synchronous rectifier included in the switched mode power converter. One or more of the circuit components may be disabled to reduce power consumption.Type: ApplicationFiled: May 7, 2014Publication date: May 7, 2015Applicant: Dialog Semiconductor Inc.Inventors: Pengju Kong, Andrew Kwok-Cheung Lee
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Patent number: 8716948Abstract: The embodiments disclosed herein describe the dynamic control of a switching power converter between different operation modes of the switching power converter. In one embodiment, the operation modes of the switching power converter include a switching mode and a linear mode. The switching power converter may be included in a LED lamp system according to one embodiment.Type: GrantFiled: March 13, 2012Date of Patent: May 6, 2014Assignee: Dialog Semiconductor Inc.Inventors: Andrew Kwok-Cheung Lee, Chuanyang Wang, Jiang Chen, Liang Yan
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Publication number: 20140085940Abstract: A controller of a switching power converter includes a voltage protection circuit that generates a modified supply voltage that does not exceed a predetermined threshold voltage to power one or more components of the controller.Type: ApplicationFiled: September 19, 2013Publication date: March 27, 2014Applicant: iWatt Inc.Inventors: Andrew Kwok-Cheung Lee, Jiang Chen, Yong Li
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Publication number: 20130339202Abstract: A system and method for detecting billing errors using predictive models is provided. The system includes a computer system and a billing error detection engine capable of detecting billing errors using predictive modeling techniques. The system receives and pre-processes billing information. The system then applies one or more predictive models to the information to identify billing errors. The results could be optionally sent to, and reviewed by, third party auditors, whereby their feedback could be incorporated into the results. A final report is generated by the system which indicates billing errors that require correction, thereby allowing an entity to correct such errors and prevent revenue leakage.Type: ApplicationFiled: June 13, 2013Publication date: December 19, 2013Inventors: Qi Zhao, Andrew Kwok, Manjunatha Jagalur, Eric Doi, Abhikesh Nag, Jacob Spoelstra
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Patent number: 8576586Abstract: A switching power converter comprises a transformer (110), a switch (108) coupled to the transformer (110), and a switch controller (200) coupled to the switch (108) for generating a switch drive signal (207) to turn on or off the switch (108). The drive current of the switch drive signal (207) is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the drive current.Type: GrantFiled: September 28, 2007Date of Patent: November 5, 2013Assignee: iWatt Inc.Inventors: Junjie Zheng, Jun Zheng, Andrew Kwok-Cheung Lee, John William Kesterson, Allan Ming-Lun Lin, Hien Huu Bui, Carrie Seim, Yong Li
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Publication number: 20130279209Abstract: The drive current of the switch in a switching power converter is adjusted dynamically according to line or load conditions within a switching cycle and/or over a plurality of switching cycles. The magnitude of the switch drive current can be dynamically adjusted within a switching cycle and/or over a plurality of switching cycles, in addition to the pulse widths or pulse frequencies of the switch drive current.Type: ApplicationFiled: June 18, 2013Publication date: October 24, 2013Inventors: Junjie Zheng, Jun Zheng, Andrew Kwok-Cheung Lee, John William Kesterson, Allan Ming-Lun Lin, Hien Huu Bui, Carrie Seim, Yong Li
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Publication number: 20130242625Abstract: A power converter that controls a collector current of a bipolar junction transistor (BJT) by controlling the base current to the BJT after having determined the gain of the BJT. A gain detection block determines a gain of the BJT during a first mode. A current calculation block generates a current setting for the base current based on the gain of the BJT determined by the gain detection block during a second mode distinct from the first mode. In some embodiments, the power converter may be included in a LED lamp system.Type: ApplicationFiled: March 13, 2012Publication date: September 19, 2013Applicant: IWATT INC.Inventors: Liang Yan, Clarita C. Poon, Hien Huu Bui, Chuanyang Wang, Andrew Kwok-Cheung Lee, John William Kesterson
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Publication number: 20130241430Abstract: The embodiments disclosed herein describe the dynamic control of a switching power converter between different operation modes of the switching power converter. In one embodiment, the operation modes of the switching power converter include a switching mode and a linear mode. The switching power converter may be included in a LED lamp system according to one embodiment.Type: ApplicationFiled: March 13, 2012Publication date: September 19, 2013Applicant: IWATT, INC.Inventors: Andrew Kwok-Cheung Lee, Chuanyang Wang, Jiang Chen, Liang Yan