Patents by Inventor Attilio Grandi

Attilio Grandi 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).

  • Submersible pump with improved sealing means
    Patent number: 4224009
    Abstract: A submersible pump provided with improved labyrinth to avoid undesirable leakage of a pump fluid into the hydraulic motor of the pump and to avoid leakage of hydraulic motor into the pump.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: September 23, 1980
    Assignee: Termomeccanica Italiana S.p.A.
    Inventor: Attilio Grandi