Patents by Inventor Donald Na

Donald Na 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).

  • Smart card device, system including the same and method of operating smart card system
    Patent number: 10565405
    Abstract: A smart card may include data storage and transmission circuitry, a plurality of voltage controllers to supply operational power to card circuitry, a plurality of oscillators to supply an internal clock for the card, and power management circuitry. The power management circuitry may be configured to shut down the oscillators and at least one, but not all, voltage controllers during a period after a data transmission is completed.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: February 18, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyuck-Jun Cho, Donald Na, Seung-Hwan Baek, Jae-Keun Oh, Kee-Moon Chun
  • SMART CARD DEVICE, SYSTEM INCLUDING THE SAME AND METHOD OF OPERATING SMART CARD SYSTEM
    Publication number: 20170169256
    Abstract: A smart card may include data storage and transmission circuitry, a plurality of voltage controllers to supply operational power to card circuitry, a plurality of oscillators to supply an internal clock for the card, and power management circuitry. The power management circuitry may be configured to shut down the oscillators and at least one, but not all, voltage controllers during a period after a data transmission is completed.
    Type: Application
    Filed: February 14, 2017
    Publication date: June 15, 2017
    Inventors: Hyuck-Jun CHO, Donald NA, Seung-Hwan BAEK, Jae-Keun OH, Kee-Moon CHUN
  • Method of operating smart card and method of operating smart card system including the same
    Patent number: 9589221
    Abstract: A smart card may include data storage and transmission circuitry, a plurality of voltage controllers to supply operational power to card circuitry, a plurality of oscillators to supply an internal clock for the card, and power management circuitry. The power management circuitry may be configured to shut down the oscillators and at least one, but not all, voltage controllers during a period after a data transmission is completed.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: March 7, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyuck-Jun Cho, Donald Na, Seung-Hwan Baek, Jae-Keun Oh, Kee-Moon Chun
  • METHOD OF OPERATING SMART CARD AND METHOD OF OPERATING SMART CARD SYSTEM INCLUDING THE SAME
    Publication number: 20160078337
    Abstract: A smart card may include data storage and transmission circuitry, a plurality of voltage controllers to supply operational power to card circuitry, a plurality of oscillators to supply an internal clock for the card, and power management circuitry. The power management circuitry may be configured to shut down the oscillators and at least one, but not all, voltage controllers during a period after a data transmission is completed.
    Type: Application
    Filed: August 6, 2015
    Publication date: March 17, 2016
    Inventors: Hyuck-Jun Cho, Donald Na, Seung-Hwan Baek, Jae-Keun Oh, Kee-Moon Chun