Patents by Inventor Tsu-Yu Lai

Tsu-Yu Lai 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).

  • Cardboard trays
    Patent number: 4305543
    Abstract: An improved construction for cardboard trays made from a single cardboard blank, in which the side panels are held in position by tabs formed around the outer corners of one of two adjacent side panels, where the tabs are folded over to enfold the edge or edges of the neighboring side panel having flaps formed on and folded inwardly therefrom.
    Type: Grant
    Filed: February 1, 1980
    Date of Patent: December 15, 1981
    Inventor: Tsu-Yu Lai