Patents by Inventor Christian P. Harper

Christian P. Harper 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).

  • Microfilm projection printer
    Patent number: 4136947
    Abstract: A continuous printer for microfilm especially adapted to receive unperforated 35mm film carrying microfilm images and project such images onto other film such as 16mm or 8mm film, the printing being done continuously as opposed to a step-by-step process.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: January 30, 1979
    Inventors: James F. Harper, James F. Harper, Jr., Christian P. Harper