Patents by Inventor Hong K. Joo

Hong K. Joo 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: 4371278
    Abstract: A single portable instrument is capable of use both as a writing device and as a wind instrument.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: February 1, 1983
    Inventor: Hong K. Joo