Patents by Inventor Hwa-Chen Liu

Hwa-Chen Liu 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).

  • Laminating machine for paper protection
    Patent number: 5232538
    Abstract: A laminating machine for paper protection, particularly a laminating machine with a motor and a transmission device located within a casing composed of an upper casing member and a lower casing member, a pair of rollers rotating in opposite direction; having a heating element, a thermal sensor, a heat distribution plate and a heater base to melt plastic film and adhere it to paper or card; and incorporated with a pair of back to back cooling plates to cool down the laminated paper or card.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: August 3, 1993
    Assignee: Age Technology Co., Ltd.
    Inventor: Hwa-Chen Liu
  • Heater fan
    Patent number: D422348
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: April 4, 2000
    Assignee: Pelonis USA, Ltd.
    Inventor: Hwa-Chen Liu