Patents by Inventor Eui-Wan Lee

Eui-Wan Lee 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).

  • MOTOR DRIVING CONTROL SYSTEM AND CONTROL METHOD THEREOF
    Publication number: 20240171112
    Abstract: The present invention relates to a motor driving control system and a control method thereof. The purpose of the present invention is to provide a motor driving control system and a control method thereof, which may change electric current limiting logic, which is applied to a BLDC motor for a cooling fan, in response to an operating speed of the motor to stably protect the motor from an overload in a low-speed driving state as well as an overload in a high-speed driving state.
    Type: Application
    Filed: March 8, 2022
    Publication date: May 23, 2024
    Inventors: Kyung Won AN, Min Sik KIM, Sang Hun KIM, Won Seok KIM, Tae Wan KIM, Pureunsam PARK, Sung Joon LEE, Song Cheol LEE, Ho Bin IM, Eui Hyun KIM
  • Wafer boat
    Patent number: 4355974
    Abstract: A wafer processing boat is provided with parallel slots that support each wafer at a slight angle with respect to vertical so that the wafers lean by gravity in a uniform manner and are thereby arranged in spaced parallel relationship. This enables the tolerances within the slots to be quite large with respect to the width of the wafer edges thus facilitating insertion and removal of the wafers while minimizing wafer damage and increasing wafer processing uniformity.
    Type: Grant
    Filed: November 24, 1980
    Date of Patent: October 26, 1982
    Assignee: ASQ Boats, Inc.
    Inventor: Eui-Wan Lee