Patents by Inventor Chien-Fa Cheng

Chien-Fa Cheng 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).

  • MULTI-SCRAPER STRUCTURE FOR CLEANING A PANEL
    Publication number: 20050229341
    Abstract: The present invention discloses a multi-scraper structure. A plurality of scrapers is used in a cleaning panel process for repeatedly scraping the remnant contaminants on the surface of the panel. Moreover, a pressure control unit is used for immediately modifying the output pressure applied to a second scraper according to the resistance encountered by a first scraper.
    Type: Application
    Filed: June 9, 2004
    Publication date: October 20, 2005
    Inventors: Chien-Fa Cheng, Shih-Yu Hsu, Tung-Kuei Chang, Chun-Chieh Hsu
  • Multi-scraper structure for cleaning a panel
    Patent number: 6954962
    Abstract: The present invention discloses a multi-scraper structure. A plurality of scrapers is used in a cleaning panel process for repeatedly scraping the remnant contaminants on the surface of the panel. Moreover, a pressure control unit is used for immediately modifying the output pressure applied to a second scraper according to the resistance encountered by a first scraper.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: October 18, 2005
    Assignee: Chungwa Picture Tubes, Ltd.
    Inventors: Chien-Fa Cheng, Shih-Yu Hsu, Tung-Kuei Chang, Chun-Chieh Hsu