Patents by Inventor Dorothy V. B. Schaeffer

Dorothy V. B. Schaeffer 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).

  • Combination book with magnifying page insert
    Patent number: 5333907
    Abstract: A magnifying insert for a book having a transparent first section, a flexible second section fixedly attached to the first section and a magnifying lens section fixedly attached to the second section. The first section can include a first surface and a second surface having a transparent, pressure-sensitive adhesive applied to the second surface adapted to adhere to the front cover and the back cover. The magnifying insert can be made of a plastic and more particularly, the magnifying lens section can be made of an acrylic material. A tab can be attached to the magnifying lens section.
    Type: Grant
    Filed: August 18, 1993
    Date of Patent: August 2, 1994
    Inventor: Dorothy V. B. Schaeffer