Patents by Inventor Ha-ryeong Oh

Ha-ryeong Oh 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).

  • Dialogic style RF guidance system for a visually handicapped person and its control method
    Patent number: 6097305
    Abstract: The dialogic style RF guidance system comprises multiple stationary base-sets established at the destination and the hand-held apparatus carried along by the visually handicapped people. This provides safe and efficient guidance to visually handicapped people in reaching their destinations, and more conveniently communicates with the base-set and simultaneously receives the message from the base-set through the microphones or external speakers.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: August 1, 2000
    Assignees: Korea Mobile Telecommunications Corp., Kookmin University
    Inventors: Jae-bong Im, Jeong-gi Kim, Hong-gu Jo, Ha-ryeong Oh