Patents by Inventor Pradip Kanti Mitra

Pradip Kanti Mitra 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).

  • Crane
    Patent number: 3992836
    Abstract: The boom of a crane is provided with a prestressing means to place the top of the boom in compression and the bottom of the boom in tension.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: November 23, 1976
    Inventor: Pradip Kanti Mitra