Patents by Inventor Mark Silberman

Mark Silberman 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).

  • Animal squeezer cage converter
    Patent number: 4991543
    Abstract: An animal squeezer cage converter for a cage is provided and consists of an inner push rack which fits into and can slide towards and away from rear wall of the cage and an outer cage door frame which hinges and locks into place on the cage. The push rack can be releasably attached to rear of the cage door frame while there is a mechanism for adjustably locking and releasing the push rack between the cage door frame and the rear wall of the cage to restrain an animal therein.
    Type: Grant
    Filed: April 17, 1989
    Date of Patent: February 12, 1991
    Inventor: Mark Silberman