Patents by Inventor John J. Prochaska

John J. Prochaska 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).

  • Patent number: 4171117
    Abstract: A manually adjustable picture hanger for hanging a picture frame in a stable level attitude. Three embodiments are described, each of which includes a flat bracket means, a first pointed probe extending through a channel formed in the bracket means, and a second pointed probe extending through an opening in the bracket means. Manual force applied to the picture frame pivots the bracket means about the second probe for adjustment to a preselected level attitude. The frame is retained in a stable position by frictional abutment between the first and second probes, the bracket means, and the frame.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: October 16, 1979
    Inventor: John J. Prochaska