Patents by Inventor John Protz

John Protz 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).

  • Device for indicating direction of barometric pressure trends
    Patent number: 4054058
    Abstract: Direction of barometric pressure trend is portrayed by my invention. Changes in barometric pressure are amplified by a linkage member and converted into a signal by trend means to discern an increase or decrease in trend. Motor means receives the signal from trend means and activates display means to show the direction of barometric pressure trend.
    Type: Grant
    Filed: January 3, 1977
    Date of Patent: October 18, 1977
    Inventor: John Protz