Patents by Inventor Nam Bu Cho

Nam Bu Cho 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).

  • Ink cartridge refill case
    Patent number: D422632
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: April 11, 2000
    Assignee: Inktec Co., Inc.
    Inventors: Kwang Choon Chung, Young Ho Chung, Chang Soo Yu, Nam Bu Cho, Ju Yeon Lee, Ju Jin Choi