Patents by Inventor Manuel R. Alvarez

Manuel R. 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).

  • Practice bat
    Patent number: 4555111
    Abstract: A practice bat for baseball players including a handle portion, and a weighted end portion interconnected by a resilient spring. The weighted end portion is remote from the hands of the player holding the handle portion so that when the bat is swung the momentum of the weighted end portion will cause it to lag behind and then move ahead of a longitudinal at rest axis of the handle portion causing the player's wrists to break or bend.
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: November 26, 1985
    Inventor: Manuel R. Alvarez