Patents by Inventor Winfried Sandner

Winfried Sandner 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 copying apparatus
    Patent number: 3991483
    Abstract: A photographic copying apparatus of the type in which a copy is guided through a hermetically sealed drying chamber disposed behind a developing liquid tank so that the copy may be dried by heat produced in the drying chamber is improved in that at least one heating plate is provided for guiding the copy thereon.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: November 16, 1976
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wilhelm Knechtel, Gerhard Petersdorf, Winfried Sandner
  • Copying apparatus
    Patent number: RE29187
    Abstract: A copying apparatus in which thin or thick originals such as individual sheets or thick books are selectively driven over an illumination slit aperture, characterized by a transparent book support such as a glass plate connected to a known transport mechanism for individual sheets such as a pair of transport rolls. The book support is located on the extension of the transport mechanism, and the transport mechanism and the book support are selectively movable together.
    Type: Grant
    Filed: June 25, 1975
    Date of Patent: April 19, 1977
    Assignee: Canon Kabushiki Kaisha
    Inventors: Wilhelm Knechtel, Gerhard Petersdorf, Winfried Sandner