Patents by Inventor Oh Hyun Roh

Oh Hyun Roh 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).

  • Patent number: 6780213
    Abstract: A personal air cleaning apparatus which draws in, in a concentrated fashion, air present in a contaminated zone, and outwardly discharges the air to a clean zone after the air has been filtered. The apparatus includes a sucking/discharging unit having a suction port for sucking in contaminated air, and a discharge port for discharging filtered air, a filter for outwardly discharging air received from the sucking/discharging unit while supplying clean air via the sucking/discharging unit, a conduit for connecting the sucking/discharging unit to the filter, and a position determining member arranged around the conduit unit and adapted to allow the conduit unit to be bent without being folded, while fixing the position of the sucking/discharging unit.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: August 24, 2004
    Inventors: Jo Won Chang, Oh Hyun Roh
  • Publication number: 20030150195
    Abstract: Disclosed is a personal air cleaning apparatus which sucks, in a concentrated fashion, air present in a contaminated zone, and outwardly discharges the sucked air or supplying filtered air to the zone, thereby securing a local clean zone. The apparatus includes a sucking/discharging unit having a suction port for sucking contaminated air, and a discharge port for discharging filtered air, a filter for outwardly discharging air received from the sucking/discharging unit while supplying clean air via the sucking/discharging unit, a conduit for connecting the sucking/discharging unit to the filter, and a position determining member arranged around the conduit unit and adapted to allow the conduit unit to be bent without being folded, while fixing the position of the sucking/discharging unit.
    Type: Application
    Filed: February 14, 2002
    Publication date: August 14, 2003
    Inventors: Jo Won Chang, Oh Hyun Roh