Patents by Inventor Daniel Northrup

Daniel Northrup 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).

  • Photographic easel system
    Patent number: 4150895
    Abstract: In the disclosed easel system, a base supports a number of interchangeable facilities for engaging photographic material such as enlarging paper. These facilities may provide variable borders, fixed borders, hold the material for unbordered pictures, and secure the material for contact prints. Hinges hold the various facilities in a preparatory position when the material is being changed.
    Type: Grant
    Filed: July 13, 1977
    Date of Patent: April 24, 1979
    Assignee: Saunders Photo/Graphic Inc.
    Inventors: Daniel Northrup, Steven Hess