Patents by Inventor Carl L. Settle

Carl L. Settle 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).

  • Clued letter set
    Patent number: 4221061
    Abstract: A set of alphabetical letters in material form for composing words with word pronunciation clued by structural distinctions between members of the set in addition to structural differences denoting alphabetic distinctions.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: September 9, 1980
    Inventor: Carl L. Settle