Patents by Inventor Edward C. Caldwell

Edward C. Caldwell 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).

  • Device for use in paired associate learning
    Patent number: 4194301
    Abstract: A device for use in situations involving paired associate learning. The device includes a plurality of stimuli which are each removably positioned to be viewed through a viewing hole associated therewith, and a plurality of stimulus covers each removably positioned to cover a viewing hole. The stimuli are letters, letter combinations, numerals and numeral combinations, or the like. Reading, number concepts and mathematics can be taught using the device.
    Type: Grant
    Filed: May 10, 1978
    Date of Patent: March 25, 1980
    Inventor: Edward C. Caldwell