Patents by Inventor K. M. Chang

K. M. Chang 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).

  • Method for processing a film
    Publication number: 20030034589
    Abstract: A method for processing a film. The method impressing the whole surface or a selected surface of the film to form protuberant structures on the film by using a transfer and an impresser which has grain projections formed thereon, wherein the protuberant structures have a protuberant shape with an opening hole on the tip or without an opening hole on the tip.
    Type: Application
    Filed: February 25, 2002
    Publication date: February 20, 2003
    Inventors: David Lin, K. M. Chang, Chi-Ping Chang