Patents by Inventor C. J. Olszowka

C. J. Olszowka 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).

  • Door jammer
    Patent number: 4973093
    Abstract: A device for securing a closed inward swinging door from the interior, consisting of a vertical shaft of which one end is secured near the door handle and the opposite end has a pad which rests on the floor. Embedded into or located in this pad may be a one or more spikes or protrusions which upon an attempt to open the inward-swinging door from the exterior push down into the floor thus prohibiting its opening.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: November 27, 1990
    Inventor: C. J. Olszowka