Patents by Inventor Luigi Zaretti

Luigi Zaretti 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).

  • Precast element for the construction of trenched structures and the process related thereto
    Patent number: 4073148
    Abstract: Structures are installed below grade by trenched construction. Precast wall elements, having a generally rectangular-shaped wall with at least one of its faces having essentially vertically-oriented parallel ribs, are placed in mud-filled trenches. Liquid concrete is then poured between the ribs to provide a foundation and to secure the wall element to the ground.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: February 14, 1978
    Assignee: Alpina S.p.A.
    Inventor: Luigi Zaretti