Patents by Inventor Cheuk S. Chu

Cheuk S. Chu 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).

  • Rucksack frame
    Patent number: 4135654
    Abstract: The rucksack frame comprises longitudinal and transverse plastics members of generally C-shaped cross-section, open towards the rear of the frame. Each member has an integral rib, preferably of round cross-section, which extends along the interior of the member and strengthens it against bending or breaking.
    Type: Grant
    Filed: April 11, 9177
    Date of Patent: January 23, 1979
    Assignee: Yip Hing Camping Goods Manufactury Limited
    Inventor: Cheuk S. Chu