Patents by Inventor Frank Tangorra

Frank Tangorra 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).

  • Perpetual calendar
    Patent number: 4793080
    Abstract: A perpetual calendar that has a flat frame with two cavities. When cards are arranged in each cavity of the frame it will display a specific month. To display a particular number of days in a month, select the proper 31 day card and arrange the vertical slits on the card with the horizontal slit on the frame to obtain 28, 29, 30 or 31 days. To display a particular month choose the name of the month card to be viewed and insert it in the position of the frame provided for it. The few cards that are not used will remain in the frame cavities behind the month being displayed.This perpetual calendar can also display three consecutive months at one time.
    Type: Grant
    Filed: November 3, 1986
    Date of Patent: December 27, 1988
    Inventor: Frank Tangorra