Patents by Inventor William Robert Farmer

William Robert Farmer 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).

  • Colorcode speller
    Patent number: 3982333
    Abstract: Means of teacher teaching and pupil learning to spell words and sentences, with code marked alphabet letters and code marked word and sentence lanes.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: September 28, 1976
    Inventor: William Robert Farmer