Patents by Inventor Jacobus M. De Vries

Jacobus M. De Vries 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).

  • Mechanised ballistic target
    Patent number: 5433451
    Abstract: A mechanised ballistic target presents a hinged target plate which is knocked down out of sight when hit by a bullet and the shock of the bullet impact on the plate is absorbed pneumatically by a rubber suction cup which the plate strikes; the suction cup has an air leakage passage defined by a capillary tube which sets a time delay before the suction cup releases the target plate to allow a spring to return the target plate to a ready position for the next shot.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: July 18, 1995
    Inventor: Jacobus M. De Vries