Patents by Inventor Frederick John Sheldon

Frederick John Sheldon 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).

  • Collapsible baby carriage
    Patent number: D248938
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: August 15, 1978
    Assignee: Lawrence Wilson & Son Limited
    Inventors: Angus Christopher Firth, Frederick John Sheldon, John Atherton, William John Block