Patents by Inventor David Kuan

David Kuan 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).

  • Publication number: 20230384862
    Abstract: Broadly speaking, embodiments of the present techniques provide haptic button assemblies in which the haptic button has a low profile while still providing a satisfying tactile response or sensation to a user. Advantageously, the haptic button assemblies may have a profile that, for example, enables the assembly to be incorporated into the free space along an edge of a portable computing device. The haptic assemblies may, for example, be arranged to move the button perpendicularly with respect to the edge of the device.
    Type: Application
    Filed: August 7, 2023
    Publication date: November 30, 2023
    Inventors: David Kuan Wei Ooi, Peter Van Wyk, Joshua Carr, Thomas James Powell, Marc-Sebastian Scholz, Andreas Flouris, Andrew Benjamin Simpson Brown, Stephen Matthew Bunting, Dominic George Webber, James Howarth
  • Patent number: 11762468
    Abstract: Broadly speaking, embodiments of the present techniques provide haptic button assemblies in which the haptic button has a low profile while still providing a satisfying tactile response or sensation to a user. Advantageously, the haptic button assemblies may have a profile that, for example, enables the assembly to be incorporated into the free space along an edge of a portable computing device. The haptic assemblies may, for example, be arranged to move the button perpendicularly with respect to the edge of the device.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: September 19, 2023
    Assignee: CAMBRIDGE MECHATRONICS LIMITED
    Inventors: David Kuan Wei Ooi, Peter Van Wyk, Joshua Carr, Thomas James Powell, Marc-Sebastian Scholz, Andreas Flouris, Andrew Benjamin Simpson Brown, Stephen Matthew Bunting, Dominic George Webber, James Howarth
  • Publication number: 20230291581
    Abstract: Arrangements and methods for a program-read-erase memory using ReRAM cells is disclosed. The memory includes an array of pristine ReRAM cells. A first digital symbol is encoded in the memory by partially forming cells, while the opposite digital value is encoded in pristine cells. As part of a read process, all cells are subject to partial formation voltage which erases all data as it is being read. ReRAM memories used in this manner are advantageously usable to store challenges for interrogating PUFs for recovery of PUF-generated encryption keys.
    Type: Application
    Filed: March 13, 2023
    Publication date: September 14, 2023
    Inventors: Bertrand F. Cambou, Ian Burke, Taylor Begay, David Kuan-Yu Liu
  • Publication number: 20210365120
    Abstract: Broadly speaking, embodiments of the present techniques provide haptic button assemblies in which the haptic button has a low profile while still providing a satisfying tactile response or sensation to a user. Advantageously, the haptic button assemblies may have a profile that, for example, enables the assembly to be incorporated into the free space along an edge of a portable computing device. The haptic assemblies may, for example, be arranged to move the button perpendicularly with respect to the edge of the device.
    Type: Application
    Filed: February 26, 2019
    Publication date: November 25, 2021
    Inventors: David Kuan Wei Ooi, Peter Van Wyk, Joshua Carr, Thomas James Powell, Marc-Sebastian Scholz, Andreas Flouris, Andrew Benjamin Simpson Brown, Stephen Matthew Bunting, Dominic George Webber, James Howarth
  • Patent number: 8301780
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, the presence of an added layer of intelligence effectively traverses and is agnostic to the various standards layers.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: October 30, 2012
    Assignee: Nextel Communications, Inc.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trin D. Vu, Hung Bui
  • Patent number: 8301734
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, an application client registers in either an integrated mode or a standalone mode based whether an application availability notification is received within a predetermined period of time.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: October 30, 2012
    Assignee: Nextel Communications, Inc.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trinh D. Vu, Hung Bui
  • Patent number: 8055201
    Abstract: A system and method for providing integrated voice quality measurements for wireless networks, based on actual calls made by end devices, are provided. The system includes a plurality of end devices, each of which includes an algorithm for determining voice quality data; an over-the-air server configured to enable voice quality reporting in the end devices; a messaging server configured to receive voice quality reports from the end devices; a voice quality server configured to receive the voice quality reports from the messaging server and consolidate the voice quality reports; and a call data record server configured to combine call records and the consolidated voice quality reports.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: November 8, 2011
    Assignee: Nextel Communications Inc.
    Inventor: David Kuan
  • Patent number: 8055262
    Abstract: Several embodiments of an IMS communications network are disclosed. In one embodiment, the network comprises a plurality of dispatch application servers (DAS), an S-CSCF, and an event notification server. The S-CSCF is adapted to receive an IMS registration request from a dispatch client, authenticate the registration request, send a registration confirmation to the dispatch client, and send a notification indicating the registration of the dispatch client to an event notification server. The event notification server is adapted to receive the notification from the S-CSCF, select a DAS, and send a notification to the selected DAS indicating an assignment to provide dispatch service to the dispatch client. In another embodiment, the registration notification to the event notification server is sent from the dispatch client, instead of the S-CSCF.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: November 8, 2011
    Assignee: Nextel Communications Inc.
    Inventors: Trinh D. Vu, Ojas Choksi, Ramesh Kalathur, Moshe Stoler, Hung Bui, David Kuan
  • Patent number: 7944750
    Abstract: A non-volatile memory device and method for manufacture and programing which does not require a control gate for the programing or erasure of the device. The memory device is comprised of two wells with the opposite conductivity type of the semiconductor body. In one of the wells is a source and drain well of the same conductivity type as of the body. A oxide is formed on the surface of the body on which a floating gate is formed. Specific voltages are applied to the source, drain, first well and second well region to program, erase and read the memory device.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: May 17, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Albert Bergemont, David Kuan-Yu Liu, Venkatraman Prabhakar, Sridevi Rajagopalan Schmidt
  • Patent number: 7835184
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: November 16, 2010
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Patent number: 7835186
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: November 16, 2010
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Patent number: 7791955
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: September 7, 2010
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Patent number: 7535758
    Abstract: Methods and apparatus, including computer program products, for a one or multiple-times programmable memory device. A semiconductor may include an active region of a substrate, a thin oxide layer over a substrate, a first and second polysilicon layer, and a first and second metal layer. The first polysilicon layer may have a floating gate, the active region may be substantially perpendicular to the floating gate, and the second polysilicon layer may include a control gate. The first metal layer may include a bit line connected to a first n-diffused region, where the bit line is substantially perpendicular to the floating gate. The second metal layer may include a word line and source line. The word line may be connected to the control gate, and the source line may be connected to a second n-diffused region. The thin gate oxide may have a thickness between 65 and 75 angstroms.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: May 19, 2009
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Albert Bergemont, David Kuan-Yu Liu, Venkatraman Prabhakar
  • Publication number: 20090014772
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Application
    Filed: September 18, 2008
    Publication date: January 15, 2009
    Applicant: Maxim Integrated Products, Inc.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Publication number: 20080273392
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 6, 2008
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Publication number: 20080273401
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Application
    Filed: July 7, 2008
    Publication date: November 6, 2008
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Patent number: 7436710
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Grant
    Filed: March 12, 2007
    Date of Patent: October 14, 2008
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Publication number: 20080225601
    Abstract: A memory device including a plurality of memory cells, each with a control gate NMOS transistor sharing a floating gate with a program/erase PMOS transistor which is, in turn, connected in series with an access PMOS transistor. The memory cells are formed in a common N-Well formed in a P-substrate, the NMOS transistor being formed in a p-doped pocket or base. The program/erase PMOS includes a gate, and first and second P+ doped regions formed in the N-Well, wherein the first P+ region is electrically connected to a corresponding bit line. The access PMOS includes a gate, and first and second P+ regions formed within the N-Well, wherein the first P+ region is electrically connected to the second P+ region of the program/erase PMOS, and the gate is electrically connected to a corresponding word line.
    Type: Application
    Filed: March 12, 2007
    Publication date: September 18, 2008
    Applicant: MAXIM INTEGRATED PRODUCTS, INC.
    Inventors: Nirmal Ratnakumar, Venkatraman Prabhakar, David Kuan-Yu Liu
  • Publication number: 20080186773
    Abstract: Methods and apparatus, including computer program products, for a one or multiple-times programmable memory device. A semiconductor may include an active region of a substrate, a thin oxide layer over a substrate, a first and second polysilicon layer, and a first and second metal layer. The first polysilicon layer may have a floating gate, the active region may be substantially perpendicular to the floating gate, and the second polysilicon layer may include a control gate. The first metal layer may include a bit line connected to a first n-diffused region, where the bit line is substantially perpendicular to the floating gate. The second metal layer may include a word line and source line. The word line may be connected to the control gate, and the source line may be connected to a second n-diffused region. The thin gate oxide may have a thickness between 65 and 75 angstroms.
    Type: Application
    Filed: February 6, 2007
    Publication date: August 7, 2008
    Inventors: Albert Bergemont, David Kuan-Yu Liu, Venkatraman Prabhakar
  • Publication number: 20080077654
    Abstract: A client-based solution for seamless access to applications across networks is agnostic to the inter-network mix of application architectures with or without IMS. In one embodiment, the presence of an added layer of intelligence effectively traverses and is agnostic to the various standards layers.
    Type: Application
    Filed: September 26, 2006
    Publication date: March 27, 2008
    Applicant: NEXTEL COMMUNICATIONS, INC.
    Inventors: David Kuan, Ramesh Kalathur, Moshe Stoler, Ojas T. Choksi, Trin D. Vu, Hung Bui