Patents by Inventor Chang Hyeon Ji

Chang Hyeon Ji 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).

  • Publication number: 20040091202
    Abstract: In an optical switch including an input block in which light is incident; an output block for transferring input light from the input block; and a reflector for performing a switching operation by reflecting input light from the input block, wherein the input block and the output block are arranged so as to make input light from the input block and reflected light reflected on the reflector and transferred to the output block have an acute angle less than 90 degrees, and accordingly an optical switch capable of simplifying an assembly process and a package process and reducing a size of an optical switch package can be provided.
    Type: Application
    Filed: October 21, 2003
    Publication date: May 13, 2004
    Applicant: LG Electronics Inc.
    Inventors: Chang-Hyeon Ji, Young-Joo Yee, Jong-Uk Bu
  • Publication number: 20030037821
    Abstract: A leak control valve preventing the damage of the vacuum pump and/or the neighboring instruments even in the case of fluid leak at the vessel.
    Type: Application
    Filed: August 28, 2002
    Publication date: February 27, 2003
    Inventor: Chang-Hyeon Ji