Patents by Inventor Sidney Chevin

Sidney Chevin 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 printing of superimposed images
    Patent number: 4255047
    Abstract: Apparatus is disclosed enabling superimposed images to be readily and easily printed on photographic paper. The apparatus employs a transparent member, carrying one or more masks, which is arranged between a photographic negative holder and a photographic paper support in a photographic printing machine. Means are provided for moving the transparent member and for sensing and indicating the position of at least one of said masks.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: March 10, 1981
    Assignee: Studio 21 (Sales) Ltd.
    Inventors: Sidney Chevin, Philip S. Fisher