Patents by Inventor Hyun Won SEO

Hyun Won SEO 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).

  • Grid voltage phase detector
    Patent number: 11971437
    Abstract: A grid voltage phase detector includes: a d-q transformation unit for receiving a three-phase signal and producing a signal on d axis and a signal on q axis; a phase signal producing unit for producing a signal for phase synchronization of grid voltage from the signal on d axis and the signal on q axis; and a PR filtering unit, with a first filter having no change in magnitude and phase at a rated frequency, a second filter introducing 90° phase lead at a rated frequency, a third filter introducing 90° phase lag, and a fourth filter having no change in magnitude and phase at a rated frequency, for removing unbalanced components and harmonic components from the signal on d axis and the signal on q axis produced by the d-q transformation unit and providing the signals to the phase signal producing unit.
    Type: Grant
    Filed: May 25, 2020
    Date of Patent: April 30, 2024
    Assignee: HYOSUNG HEAVY INDUSTRIES CORPORATION
    Inventors: Hyun Jun Kim, Hae Won Seo, Byung Hwan Jeong
  • REFRIGERATOR
    Publication number: 20240102727
    Abstract: A refrigerator may include a storage compartment, an inner door which comprises an opening having a size corresponding to a size of the storage compartment, a plurality of door guards, and an outer door which open and close the storage compartment, wherein the inner door comprises a control unit may control an internal environment of the storage compartment.
    Type: Application
    Filed: December 6, 2023
    Publication date: March 28, 2024
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyun Joo KIM, Yong Man SEO, In-Sung HWANG, Bok Hyun JANG, Tae Youl LEE, Jeong Won CHOI
  • Substrate processing apparatus and method of fabricating semiconductor device using the same
    Patent number: 11927890
    Abstract: A substrate processing apparatus includes a photoresist coater applying a photoresist film on a substrate, a humidifier increasing an amount of moisture in an ambient to which the photoresist film on the substrate is exposed, and an exposer irradiating the photoresist film exposed to the ambient having the increased amount of moisture with light. The humidifier is disposed between the photoresist coater and the exposer.
    Type: Grant
    Filed: August 22, 2022
    Date of Patent: March 12, 2024
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seok Heo, Cha Won Koh, Sang Joon Hong, Hyun Woo Kim, Kyung-Won Kang, Dong-Wook Kim, Kyung Won Seo, Young Il Jang, Yong Suk Choi
  • NANOEMULSION OPHTHALMIC COMPOSITION COMPRISING CYCLOSPORINE AND MENTHOL, AND PREPARATION METHOD THEREOF
    Publication number: 20240041974
    Abstract: The present invention relates to a nanoemulsion ophthalmic composition and a preparation method thereof, wherein the nanoemulsion ophthalmic composition is obtained by mixing cyclosporine, castor oil, hydrophilic and hydrophobic emulsifiers, menthol, and an aqueous solvent, and thus exhibits excellent stability as well as ameliorating ocular irritation such as a feeling of grittiness, blurry vision, and the like.
    Type: Application
    Filed: September 4, 2020
    Publication date: February 8, 2024
    Applicant: TAEJOON PHARMACEUTICAL CO., LTD.
    Inventors: Joon Youb LEE, Youn Jae SHIN, Hyun Won SEO, Dae Hun KIM