Patents by Inventor Hong Yu Zheng

Hong Yu Zheng 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).

  • Process for laser marking metal surfaces
    Patent number: 6613161
    Abstract: A method of laser marking which comprises applying a laser beam to a metal surface under the influence of an assist gas to produce durable, repeatable and striking colors on the metal surface. The method provides an easy and flexible alternative to conventional metal decorating techniques.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: September 2, 2003
    Assignee: Singapore Institute of Manufacturing Technology
    Inventors: Hong Yu Zheng, Gnian Cher Lim
  • Process for laser marking metal surfaces
    Publication number: 20010030002
    Abstract: A method of laser marking which comprises applying a laser beam to a metal surface under the influence of an assist gas to produce durable, repeatable and striking colors on the metal surface. The method provides an easy and flexible alternative to conventional metal decorating techniques.
    Type: Application
    Filed: March 7, 2001
    Publication date: October 18, 2001
    Inventors: Hong Yu Zheng, Gnian Cher Lim