Patents by Inventor B. Y. Wang

B. Y. Wang 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: 4909651
    Abstract: This invention relates to a portable file for form feeds paper, which is comprised of an upper and a lower cover board, each having an integrally made channel bar for setting therein of flexible cords at both ends to let the flexible cords insert through the perforations of form feeds paper document. By means of retainer means to slide in the channel bars, the flexible cords may be pulled out for insertion into the perforations of form feeds paper or may be retained by the retainer means in the channel bars respectively. A hanger is provided and attached to the lower cover board by means of rivets, such that the file may be hanging on a storage stand with form feeds paper document carried by the file.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: March 20, 1990
    Inventor: B. Y. Wang