Patents by Inventor Gerald F. Stapleton

Gerald F. Stapleton 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: 4120451
    Abstract: A currency converter formed of a fixed frame having a hollowed-out central area and two flat parallel surfaces wherein one surface defines two large generally parallel windows having a section of one reference line of indicia extending lengthwise across the top and bottom of each window wherein each section designates a range of currency of a reference country in the form of a logarithmic scale of currency values, a first and second small window positioned between the two large windows for displaying in one of the small windows an exchange rate comprising the currency value of the reference country for each unit of currency of a selected country and in the other small window an exchange rate comprising the units of currency of a selected country for each unit of currency of the reference country and with the other surface designing a plurality of apertures formed into at least two columns of spaced aligned apertures extending in a direction substantially perpendicular to the large windows, and a removeable sl
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: October 17, 1978
    Inventor: Gerald F. Stapleton