Patents by Inventor Chiang-Han Tsai

Chiang-Han Tsai 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).

  • Backpack convertible to a stretcher
    Patent number: 6948203
    Abstract: A backpack includes an accommodating body, two slings, and a plurality of sliding plates. The accommodating body has a rectangular horizontal bottom wall, a front wall, a rear wall, and two side walls. The front, rear, and side walls extend upwardly from the bottom wall, are interconnected removably to define an accommodating space thereamong, and are removable from one another so as to be coplanar with the bottom wall, thereby forming a stretcher. The slings are fastened to an outer side surface of the front wall. The sliding plates are attached removably to a bottom surface of the stretcher, and contact the ground.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: September 27, 2005
    Inventor: Chiang-Han Tsai
  • Backpack convertible to a stretcher
    Publication number: 20040221392
    Abstract: A backpack includes an accommodating body, two slings, and a plurality of sliding plates. The accommodating body has a rectangular horizontal bottom wall, a front wall, a rear wall, and two side walls. The front, rear, and side walls extend upwardly from the bottom wall, are interconnected removably to define an accommodating space thereamong, and are removable from one another so as to be coplanar with the bottom wall, thereby forming a stretcher. The slings are fastened to an outer side surface of the front wall. The sliding plates are attached removably to a bottom surface of the stretcher, and contact the ground.
    Type: Application
    Filed: June 10, 2004
    Publication date: November 11, 2004
    Inventor: Chiang-Han Tsai