Patents by Inventor Yum Jae Chum

Yum Jae Chum 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).

  • Multi-stage combined optical device having multiple channels
    Patent number: 6122110
    Abstract: A multi-stage combined optical device having an improved structure which can detect incident light power using a single optical isolator.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: September 19, 2000
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ki Soo Park, Ki Suk Sung, Yum Jae Chum, Sang Yeong Tae, Man Soo Seo