Patents by Inventor Wing Cheong Chan

Wing Cheong Chan 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: 20230366881
    Abstract: The application relates to a method and device for quantitatively analyzing the detection results of lateral flow-type test kits. Disclosed is a method for quantitatively analyzing the test results of a lateral flow-type test kit wherein the test kit includes a result area in which a control C-line region and a detection T-line region are set.
    Type: Application
    Filed: March 29, 2023
    Publication date: November 16, 2023
    Inventors: Cheung Hoi Yu, Shui Ying Tsang, Wing Cheong Chan
  • Patent number: 11804711
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: January 4, 2022
    Date of Patent: October 31, 2023
    Assignee: STRIPE, INC.
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Publication number: 20220131371
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: January 4, 2022
    Publication date: April 28, 2022
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Patent number: 11251611
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: June 8, 2020
    Date of Patent: February 15, 2022
    Assignee: BBPOS LIMITED
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Publication number: 20200303921
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: June 8, 2020
    Publication date: September 24, 2020
    Inventors: Wing Cheong CHAN, Hwai Sian TSAI, Chi Wah LO
  • Patent number: 10686313
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: June 16, 2020
    Assignee: BBPOS LIMTED
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Publication number: 20190190262
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: February 25, 2019
    Publication date: June 20, 2019
    Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
  • Patent number: 10256627
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: April 9, 2019
    Assignee: BBPOS Limited
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Publication number: 20180048147
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: October 5, 2017
    Publication date: February 15, 2018
    Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
  • Patent number: 9793712
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: October 17, 2017
    Assignee: BBPOS LIMITED
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Publication number: 20150001946
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: September 19, 2014
    Publication date: January 1, 2015
    Inventors: WING CHEONG CHAN, HWAI SIAN TSAI, CHI WAH LO
  • Patent number: 8840017
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: September 23, 2014
    Assignee: BBPOS Limited
    Inventors: Wing Cheong Chan, Hwai Sian Tsai, Chi Wah Lo
  • Patent number: 8336771
    Abstract: A dangle, which plugs into the audio/earpiece jack of host devices, allows them to accept payment cards as a point of sale (POS) terminal. It contains a magnetic stripe (magstripe) card reader, a smart card reader, and/or a proximity card reader (reader(s)); a microprocessor or microcontroller (CPU); and a circuit for drawing power from a digital audio signal (power circuit). Payment card data is collected by the reader(s), passed to the CPU where it is encrypted, encoded, and modulated, sent to the host device through the Microphone input contact of the audio/earpiece jack, then transmitted via one the host device's networks to a merchant account provider for processing. A digital audio signal, constantly generated by the host device, provides power to the dongle via the power circuit. The power circuit converts the digital audio signal to stable DC power with the appropriate voltage for powering the dongle's other components.
    Type: Grant
    Filed: April 27, 2010
    Date of Patent: December 25, 2012
    Assignee: BBPOS Limited
    Inventors: Hwai Sian Tsai, Wing Cheong Chan
  • Publication number: 20120293001
    Abstract: A power management circuitry for a peripheral electronic device includes a power regeneration circuitry, a power selector, a power switch and an audio signal detection circuitry. The power regeneration circuitry receives a continuous periodic sound wave from an audio device and converts the continuous periodic sound wave into an amplified DC electrical signal. The power source selector receives the amplified DC electrical signal and input from a primary power source and provides a power signal output. The audio signal detection circuitry receives the amplified DC electrical signal and transmits a wake-up signal to the power switch circuitry. The power switch circuitry is turned on by the wake-up signal and connects the power source selector to the peripheral electronic device main circuitry and transfers the power signal output to the peripheral electronic device main circuitry.
    Type: Application
    Filed: July 31, 2012
    Publication date: November 22, 2012
    Applicant: BBPOS LIMITED
    Inventors: Wing Cheong CHAN, Hwai Sian TSAI, Chi Wah LO
  • Publication number: 20110087589
    Abstract: Debit or credit card transaction data includes one or a combination of digital card data read from a debit or credit card, transaction amount, shop identification information, and personal identification information like PIN numbers. This card transaction 5 data is in digital form. Where sales are performed on-the-go, it is now necessary to contact the card data center manually to obtain necessary information, for example approval code for the sales. Although it seems straight forward to send the digital card data over a mobile phone to resolve this issue, this approach has various problems including lack of support of all mobile 10 phones for data communication, expensive subscription fee to data plan is required, and unbounded delay in the transaction time. The current invention provides a method for performing debit or credit card transactions over mobile phone networks.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 14, 2011
    Applicant: BBPOS Limited
    Inventors: Derek Wing Cheong CHAN, Alan MORGAN
  • Patent number: 7915858
    Abstract: Methods and principles are described for systematizing localized charging, load identification and bi-directional communication in a planar battery charging system. Also described is control circuitry for selectively energizing a primary winding when a load is placed on the platform. The optimization of the size of the receiver winding compared to the transmitter winding is discussed, while the associated communication methods include techniques for load identification, compatibility checks, hand-shaking and communication of charging status.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: March 29, 2011
    Assignee: City University of Hong Kong
    Inventors: Xun Liu, Wing Choi Ho, Ron Shu Yuen Hui, Wing Cheong Chan
  • Publication number: 20090108805
    Abstract: Methods and principles are described for systematizing localized charging, load identification and bi-directional communication in a planar battery charging system. Also described is control circuitry for selectively energizing a primary winding when a load is placed on the platform. The optimization of the size of the receiver winding compared to the transmitter winding is discussed, while the associated communication methods include techniques for load identification, compatibility checks, hand-shaking and communication of charging status.
    Type: Application
    Filed: October 30, 2007
    Publication date: April 30, 2009
    Applicant: City University of Hong Kong
    Inventors: Xun Liu, Wing Choi Ho, Ron Shu Yuen Hui, Wing Cheong Chan
  • Publication number: 20050157854
    Abstract: A recording system for a Private Branch Automatic Exchange (PBAX) comprises a recording unit for recording a telephone conversation on the public line side of the PBAX and coding units for connecting to private lines of the PBAX and for identifying to the recording unit the private line in use. The recording unit may include a transformer for detecting a telephone conversation signal, a processor and a storage medium.
    Type: Application
    Filed: January 16, 2004
    Publication date: July 21, 2005
    Inventors: Chi Wah Lo, Tai Kwan Tang, Hwai Sian Tsai, Wing Cheong Chan