Patents by Inventor Oscar J. van Leer

Oscar J. van Leer 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).

  • Child-proof closure for a bottle or similar container
    Patent number: 5251791
    Abstract: Child-proof closure for a bottle (1) which is placed upon the neck of the bottle to replace its normal closure and which is axially slidable from a closed position towards an open position and back. The closure has locks (13,24) at the inner end of a quiver-like part (12) which can only be reached by the stretched or bent finger of an adult person and can be closed by a simple flick on top of the opened closure.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: October 12, 1993
    Assignee: Docor B.V.
    Inventor: Oscar J. van Leer
  • Safety closure for tops of containers
    Patent number: D338622
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: August 24, 1993
    Assignee: Docor B.V.
    Inventor: Oscar J. van Leer