Patents by Inventor Der-Long Chan

Der-Long Chan 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).

  • Emergency air supply device for fire accident
    Patent number: 6585583
    Abstract: The present invention provides an air supply device for fire accident, comprising an air supply pipe covered by a protective insulating layer buried at the bottom of a cement wall in the building, and such pipe tube having an air valve and an indicating sign at appropriate interval along the pipe for the survivors to obtain oxygen by hooking up the pipe.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: July 1, 2003
    Inventor: Der-Long Chan