Patents by Inventor Ernest Alvarez

Ernest Alvarez 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).

  • Interchangably headed tool
    Patent number: 4512381
    Abstract: An interchangably headed tool including an elongated handle having at one end thereof a longitudinal passage formed therein, a head for said handle, said head having a shank extending therefrom, said shank extending into the passage, a portion of the wall forming the longitudinal passage including a removable clamping plate adapted to abut the shank and clamp the head firmly in place.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: April 23, 1985
    Inventor: Ernest Alvarez